23929990 has 32 divisors (see below), whose sum is σ = 49720320. Its totient is φ = 8122464.

The previous prime is 23929967. The next prime is 23929991. The reversal of 23929990 is 9992932.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23929991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5551 + ... + 8869.

It is an arithmetic number, because the mean of its divisors is an integer number (1553760).

Almost surely, 2^23929990 is an apocalyptic number.

23929990 is an abundant number, since it is smaller than the sum of its proper divisors (25790330).

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

23929990 is a wasteful number, since it uses less digits than its factorization.

23929990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3436.

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 23929990 is about 4891.8289013415. The cubic root of 23929990 is about 288.1691634143.

The spelling of 23929990 in words is "twenty-three million, nine hundred twenty-nine thousand, nine hundred ninety".