23429778 has 48 divisors (see below), whose sum is σ = 50614848. Its totient is φ = 7216000.

The previous prime is 23429773. The next prime is 23429789. The reversal of 23429778 is 87792432.

It is not an unprimeable number, because it can be changed into a prime (23429771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 231928 + ... + 232028.

It is an arithmetic number, because the mean of its divisors is an integer number (1054476).

Almost surely, 2^23429778 is an apocalyptic number.

23429778 is an abundant number, since it is smaller than the sum of its proper divisors (27185070).

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

23429778 is a wasteful number, since it uses less digits than its factorization.

23429778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 170 counting only the distinct ones).

The product of its digits is 169344, while the sum is 42.

The square root of 23429778 is about 4840.4315923273. The cubic root of 23429778 is about 286.1471279118.

The spelling of 23429778 in words is "twenty-three million, four hundred twenty-nine thousand, seven hundred seventy-eight".