123700399290 has 256 divisors, whose sum is σ = 383477068800. Its totient is φ = 28120587264.

The previous prime is 123700399231. The next prime is 123700399337. The reversal of 123700399290 is 92993007321.

It is a happy number.

123700399290 is a `hidden beast` number, since 1 + 237 + 0 + 0 + 399 + 29 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2314752 + ... + 2367588.

It is an arithmetic number, because the mean of its divisors is an integer number (1497957300).

Almost surely, 2^123700399290 is an apocalyptic number.

123700399290 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 123700399290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191738534400).

123700399290 is an abundant number, since it is smaller than the sum of its proper divisors (259776669510).

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

123700399290 is a wasteful number, since it uses less digits than its factorization.

123700399290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52918 (or 52912 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The spelling of 123700399290 in words is "one hundred twenty-three billion, seven hundred million, three hundred ninety-nine thousand, two hundred ninety".