23453990 has 16 divisors (see below), whose sum is σ = 48248352. Its totient is φ = 8041344.

The previous prime is 23453971. The next prime is 23454001. The reversal of 23453990 is 9935432.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 23453990.

It is a congruent number.

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, 167459 + ... + 167598.

It is an arithmetic number, because the mean of its divisors is an integer number (3015522).

Almost surely, 2^23453990 is an apocalyptic number.

23453990 is an abundant number, since it is smaller than the sum of its proper divisors (24794362).

23453990 is a wasteful number, since it uses less digits than its factorization.

23453990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335071.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 23453990 is about 4842.9319631810. The cubic root of 23453990 is about 286.2456607721.

The spelling of 23453990 in words is "twenty-three million, four hundred fifty-three thousand, nine hundred ninety".