123990432 has 24 divisors (see below), whose sum is σ = 325475136. Its totient is φ = 41330112.

The previous prime is 123990431. The next prime is 123990467. The reversal of 123990432 is 234099321.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 123990393 and 123990402.

It is not an unprimeable number, because it can be changed into a prime (123990431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 645688 + ... + 645879.

It is an arithmetic number, because the mean of its divisors is an integer number (13561464).

Almost surely, 2^123990432 is an apocalyptic number.

123990432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123990432 is an abundant number, since it is smaller than the sum of its proper divisors (201484704).

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

123990432 is a wasteful number, since it uses less digits than its factorization.

123990432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291580 (or 1291572 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 123990432 is about 11135.0991014898. The cubic root of 123990432 is about 498.6502690647.

The spelling of 123990432 in words is "one hundred twenty-three million, nine hundred ninety thousand, four hundred thirty-two".