22887990 has 48 divisors (see below), whose sum is σ = 62101728. Its totient is φ = 5837568.

The previous prime is 22887979. The next prime is 22888003. The reversal of 22887990 is 9978822.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3459 + ... + 7598.

It is an arithmetic number, because the mean of its divisors is an integer number (1293786).

Almost surely, 2^22887990 is an apocalyptic number.

22887990 is an abundant number, since it is smaller than the sum of its proper divisors (39213738).

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

22887990 is a wasteful number, since it uses less digits than its factorization.

22887990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11093 (or 11090 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 22887990 is about 4784.1394210453. The cubic root of 22887990 is about 283.9242921256.

The spelling of 22887990 in words is "twenty-two million, eight hundred eighty-seven thousand, nine hundred ninety".