23405909400 has 144 divisors (see below), whose sum is σ = 83228769000. Its totient is φ = 5874416640.

The previous prime is 23405909389. The next prime is 23405909441. The reversal of 23405909400 is 490950432.

23405909400 is a `hidden beast` number, since 23 + 4 + 0 + 590 + 9 + 40 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 351850 + ... + 413049.

Almost surely, 2^23405909400 is an apocalyptic number.

23405909400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23405909400 is an abundant number, since it is smaller than the sum of its proper divisors (59822859600).

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

23405909400 is a wasteful number, since it uses less digits than its factorization.

23405909400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764938 (or 764926 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 23405909400 in words is "twenty-three billion, four hundred five million, nine hundred nine thousand, four hundred".