123475440 has 80 divisors (see below), whose sum is σ = 417580416. Its totient is φ = 29932800.

The previous prime is 123475423. The next prime is 123475483. The reversal of 123475440 is 44574321.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 123475398 and 123475407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20746 + ... + 26025.

Almost surely, 2^123475440 is an apocalyptic number.

123475440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123475440 is an abundant number, since it is smaller than the sum of its proper divisors (294104976).

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

123475440 is a wasteful number, since it uses less digits than its factorization.

123475440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46798 (or 46792 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 123475440 is about 11111.9503238630. The cubic root of 123475440 is about 497.9589327597.

The spelling of 123475440 in words is "one hundred twenty-three million, four hundred seventy-five thousand, four hundred forty".