123347531790 has 192 divisors, whose sum is σ = 375971880960. Its totient is φ = 27471847680.

The previous prime is 123347531789. The next prime is 123347531819. The reversal of 123347531790 is 97135743321.

123347531790 is a `hidden beast` number, since 1 + 2 + 3 + 3 + 47 + 531 + 79 + 0 = 666.

It is a super-2 number, since 2×123347531790² (a number of 23 digits) contains 22 as substring.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6771595 + ... + 6789785.

It is an arithmetic number, because the mean of its divisors is an integer number (1958186880).

Almost surely, 2^123347531790 is an apocalyptic number.

123347531790 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 123347531790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187985940480).

123347531790 is an abundant number, since it is smaller than the sum of its proper divisors (252624349170).

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

123347531790 is a wasteful number, since it uses less digits than its factorization.

123347531790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18487 (or 18484 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 45.

The spelling of 123347531790 in words is "one hundred twenty-three billion, three hundred forty-seven million, five hundred thirty-one thousand, seven hundred ninety".