22787990 has 16 divisors (see below), whose sum is σ = 43431552. Its totient is φ = 8578944.

The previous prime is 22787977. The next prime is 22787993. The reversal of 22787990 is 9978722.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22787993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66854 + ... + 67193.

It is an arithmetic number, because the mean of its divisors is an integer number (2714472).

Almost surely, 2^22787990 is an apocalyptic number.

22787990 is a deficient number, since it is larger than the sum of its proper divisors (20643562).

22787990 is a wasteful number, since it uses less digits than its factorization.

22787990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134071.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 22787990 is about 4773.6767800093. The cubic root of 22787990 is about 283.5101902364.

The spelling of 22787990 in words is "twenty-two million, seven hundred eighty-seven thousand, nine hundred ninety".