123471438990 has 32 divisors (see below), whose sum is σ = 296340802560. Its totient is φ = 32924678304.

The previous prime is 123471438989. The next prime is 123471438997. The reversal of 123471438990 is 99834174321.

It is a happy number.

It is a super-2 number, since 2×123471438990² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123471438997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1611327 + ... + 1686213.

It is an arithmetic number, because the mean of its divisors is an integer number (9260650080).

Almost surely, 2^123471438990 is an apocalyptic number.

123471438990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123471438990 is an abundant number, since it is smaller than the sum of its proper divisors (172869363570).

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

123471438990 is a wasteful number, since it uses less digits than its factorization.

123471438990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129856.

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 123471438990 in words is "one hundred twenty-three billion, four hundred seventy-one million, four hundred thirty-eight thousand, nine hundred ninety".