28618790 has 16 divisors (see below), whose sum is σ = 51825312. Its totient is φ = 11378304.

The previous prime is 28618789. The next prime is 28618823. The reversal of 28618790 is 9781682.

28618790 = T₅₅ + T₅₆ + ... + T₅₅₅.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6899 + ... + 10238.

It is an arithmetic number, because the mean of its divisors is an integer number (3239082).

Almost surely, 2^28618790 is an apocalyptic number.

28618790 is a deficient number, since it is larger than the sum of its proper divisors (23206522).

28618790 is a wasteful number, since it uses less digits than its factorization.

28618790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17311.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 28618790 is about 5349.6532597917. The cubic root of 28618790 is about 305.8795359339.

The spelling of 28618790 in words is "twenty-eight million, six hundred eighteen thousand, seven hundred ninety".