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118285830 = 2325131719313
BaseRepresentation
bin1110000110011…
…10011000000110
322020120112122200
413003032120012
5220240121310
615423135330
72634261435
oct703163006
9266515580
10118285830
1160850993
1233744546
131b676920
14119d111c
15a5b79c0
hex70ce606

118285830 has 192 divisors, whose sum is σ = 370319040. Its totient is φ = 25878528.

The previous prime is 118285823. The next prime is 118285837. The reversal of 118285830 is 38582811.

It is an interprime number because it is at equal distance from previous prime (118285823) and next prime (118285837).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118285837) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 377754 + ... + 378066.

It is an arithmetic number, because the mean of its divisors is an integer number (1928745).

Almost surely, 2118285830 is an apocalyptic number.

118285830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 118285830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185159520).

118285830 is an abundant number, since it is smaller than the sum of its proper divisors (252033210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

118285830 is a wasteful number, since it uses less digits than its factorization.

118285830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The square root of 118285830 is about 10875.9289258435. The cubic root of 118285830 is about 490.8825272757.

The spelling of 118285830 in words is "one hundred eighteen million, two hundred eighty-five thousand, eight hundred thirty".