28912616 has 16 divisors (see below), whose sum is σ = 54271140. Its totient is φ = 14440320.

The previous prime is 28912607. The next prime is 28912621. The reversal of 28912616 is 61621982.

It can be written as a sum of positive squares in 2 ways, for example, as 26522500 + 2390116 = 5150^2 + 1546^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

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, 9740 + ... + 12356.

Almost surely, 2^28912616 is an apocalyptic number.

It is an amenable number.

28912616 is a deficient number, since it is larger than the sum of its proper divisors (25358524).

28912616 is a wasteful number, since it uses less digits than its factorization.

28912616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004 (or 4000 counting only the distinct ones).

The product of its digits is 10368, while the sum is 35.

The square root of 28912616 is about 5377.0452852845. The cubic root of 28912616 is about 306.9227843592.

The spelling of 28912616 in words is "twenty-eight million, nine hundred twelve thousand, six hundred sixteen".