28613990 has 8 divisors (see below), whose sum is σ = 51505200. Its totient is φ = 11445592.

The previous prime is 28613983. The next prime is 28614017. The reversal of 28613990 is 9931682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1430690 + ... + 1430709.

It is an arithmetic number, because the mean of its divisors is an integer number (6438150).

Almost surely, 2^28613990 is an apocalyptic number.

28613990 is a deficient number, since it is larger than the sum of its proper divisors (22891210).

28613990 is a wasteful number, since it uses less digits than its factorization.

28613990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2861406.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 28613990 is about 5349.2046137720. The cubic root of 28613990 is about 305.8624340710.

The spelling of 28613990 in words is "twenty-eight million, six hundred thirteen thousand, nine hundred ninety".