23991330 has 32 divisors (see below), whose sum is σ = 62814528. Its totient is φ = 5816000.

The previous prime is 23991329. The next prime is 23991343. The reversal of 23991330 is 3319932.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 36021 + ... + 36680.

It is an arithmetic number, because the mean of its divisors is an integer number (1962954).

Almost surely, 2^23991330 is an apocalyptic number.

23991330 is an abundant number, since it is smaller than the sum of its proper divisors (38823198).

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

23991330 is a wasteful number, since it uses less digits than its factorization.

23991330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72722.

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 23991330 is about 4898.0945274668. The cubic root of 23991330 is about 288.4151757009.

The spelling of 23991330 in words is "twenty-three million, nine hundred ninety-one thousand, three hundred thirty".