28379636 has 6 divisors (see below), whose sum is σ = 49664370. Its totient is φ = 14189816.

The previous prime is 28379573. The next prime is 28379641. The reversal of 28379636 is 63697382.

It can be written as a sum of positive squares in only one way, i.e., 24403600 + 3976036 = 4940^2 + 1994^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3547451 + ... + 3547458.

It is an arithmetic number, because the mean of its divisors is an integer number (8277395).

Almost surely, 2^28379636 is an apocalyptic number.

It is an amenable number.

28379636 is a deficient number, since it is larger than the sum of its proper divisors (21284734).

28379636 is a wasteful number, since it uses less digits than its factorization.

28379636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7094913 (or 7094911 counting only the distinct ones).

The product of its digits is 326592, while the sum is 44.

The square root of 28379636 is about 5327.2540769143. The cubic root of 28379636 is about 305.0251202100.

The spelling of 28379636 in words is "twenty-eight million, three hundred seventy-nine thousand, six hundred thirty-six".