23487990 has 64 divisors (see below), whose sum is σ = 60134400. Its totient is φ = 5854464.

The previous prime is 23487983. The next prime is 23488013. The reversal of 23487990 is 9978432.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50499 + ... + 50961.

It is an arithmetic number, because the mean of its divisors is an integer number (939600).

Almost surely, 2^23487990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23487990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30067200).

23487990 is an abundant number, since it is smaller than the sum of its proper divisors (36646410).

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

23487990 is a wasteful number, since it uses less digits than its factorization.

23487990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581.

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

The square root of 23487990 is about 4846.4409621907. The cubic root of 23487990 is about 286.3839123507.

The spelling of 23487990 in words is "twenty-three million, four hundred eighty-seven thousand, nine hundred ninety".