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12399198 = 237295219
BaseRepresentation
bin101111010011…
…001001011110
3212022221111120
4233103021132
511133233243
61121431410
7210251160
oct57231136
925287446
1012399198
116aa9779
12419b566
132751906
14190a930
15114dc83
hexbd325e

12399198 has 16 divisors (see below), whose sum is σ = 28341120. Its totient is φ = 3542616.

The previous prime is 12399197. The next prime is 12399199. The reversal of 12399198 is 89199321.

It is an interprime number because it is at equal distance from previous prime (12399197) and next prime (12399199).

It is a super-2 number, since 2×123991982 = 307480222086408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 295219 = 12399198 / (1 + 2 + 3 + 9 + 9 + 1 + 9 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12399193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147568 + ... + 147651.

It is an arithmetic number, because the mean of its divisors is an integer number (1771320).

Almost surely, 212399198 is an apocalyptic number.

12399198 is an abundant number, since it is smaller than the sum of its proper divisors (15941922).

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

12399198 is a wasteful number, since it uses less digits than its factorization.

12399198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295231.

The product of its digits is 34992, while the sum is 42.

The square root of 12399198 is about 3521.2494941427. The cubic root of 12399198 is about 231.4539152901.

The spelling of 12399198 in words is "twelve million, three hundred ninety-nine thousand, one hundred ninety-eight".

Divisors: 1 2 3 6 7 14 21 42 295219 590438 885657 1771314 2066533 4133066 6199599 12399198