23947890 has 16 divisors (see below), whose sum is σ = 57475008. Its totient is φ = 6386096.

The previous prime is 23947829. The next prime is 23947901. The reversal of 23947890 is 9874932.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399102 + ... + 399161.

It is an arithmetic number, because the mean of its divisors is an integer number (3592188).

Almost surely, 2^23947890 is an apocalyptic number.

23947890 is an abundant number, since it is smaller than the sum of its proper divisors (33527118).

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

23947890 is a wasteful number, since it uses less digits than its factorization.

23947890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798273.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 23947890 is about 4893.6581409003. The cubic root of 23947890 is about 288.2409971595.

The spelling of 23947890 in words is "twenty-three million, nine hundred forty-seven thousand, eight hundred ninety".