23782990 has 64 divisors (see below), whose sum is σ = 54286848. Its totient is φ = 7286400.

The previous prime is 23782981. The next prime is 23782991. The reversal of 23782990 is 9928732.

It is a super-2 number, since 2×23782990² = 1131261226680200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23782991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51360 + ... + 51820.

It is an arithmetic number, because the mean of its divisors is an integer number (848232).

Almost surely, 2^23782990 is an apocalyptic number.

23782990 is an abundant number, since it is smaller than the sum of its proper divisors (30503858).

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

23782990 is a wasteful number, since it uses less digits than its factorization.

23782990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 23782990 is about 4876.7807004211. The cubic root of 23782990 is about 287.5778843811.

The spelling of 23782990 in words is "twenty-three million, seven hundred eighty-two thousand, nine hundred ninety".