23078421 has 12 divisors (see below), whose sum is σ = 33406048. Its totient is φ = 15353064.

The previous prime is 23078413. The next prime is 23078437. The reversal of 23078421 is 12487032.

23078421 is a `hidden beast` number, since 230 + 7 + 8 + 421 = 666.

It is not a de Polignac number, because 23078421 - 2³ = 23078413 is a prime.

It is a super-2 number, since 2×23078421² = 1065227031706482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23078441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2256 + ... + 7158.

Almost surely, 2^23078421 is an apocalyptic number.

It is an amenable number.

23078421 is a deficient number, since it is larger than the sum of its proper divisors (10327627).

23078421 is a wasteful number, since it uses less digits than its factorization.

23078421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5432 (or 5429 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 23078421 is about 4804.0005203996. Note that the first 3 decimals coincide. The cubic root of 23078421 is about 284.7095471191.

The spelling of 23078421 in words is "twenty-three million, seventy-eight thousand, four hundred twenty-one".