23953890 has 32 divisors (see below), whose sum is σ = 57695616. Its totient is φ = 6364800.

The previous prime is 23953873. The next prime is 23953921. The reversal of 23953890 is 9835932.

It is a super-2 number, since 2×23953890² = 1147577692264200, which contains 22 as substring.

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, 8115 + ... + 10665.

It is an arithmetic number, because the mean of its divisors is an integer number (1802988).

Almost surely, 2^23953890 is an apocalyptic number.

23953890 is an abundant number, since it is smaller than the sum of its proper divisors (33741726).

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

23953890 is a wasteful number, since it uses less digits than its factorization.

23953890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2874.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 23953890 is about 4894.2711408339. The cubic root of 23953890 is about 288.2650674996.

The spelling of 23953890 in words is "twenty-three million, nine hundred fifty-three thousand, eight hundred ninety".