189901530 has 256 divisors, whose sum is σ = 638668800. Its totient is φ = 39087360.

The previous prime is 189901507. The next prime is 189901531. The reversal of 189901530 is 35109981.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (189901531) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1449565 + ... + 1449695.

It is an arithmetic number, because the mean of its divisors is an integer number (2494800).

Almost surely, 2^189901530 is an apocalyptic number.

189901530 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 189901530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319334400).

189901530 is an abundant number, since it is smaller than the sum of its proper divisors (448767270).

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

189901530 is a wasteful number, since it uses less digits than its factorization.

189901530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 189901530 is about 13780.4764068591. The cubic root of 189901530 is about 574.7903760140.

The spelling of 189901530 in words is "one hundred eighty-nine million, nine hundred one thousand, five hundred thirty".