28851616 has 12 divisors (see below), whose sum is σ = 56801682. Its totient is φ = 14425792.

The previous prime is 28851611. The next prime is 28851619. The reversal of 28851616 is 61615882.

It can be written as a sum of positive squares in only one way, i.e., 21123216 + 7728400 = 4596^2 + 2780^2 .

It is a super-2 number, since 2×28851616² = 1664831491622912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28851611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450775 + ... + 450838.

Almost surely, 2^28851616 is an apocalyptic number.

It is an amenable number.

28851616 is a deficient number, since it is larger than the sum of its proper divisors (27950066).

28851616 is an equidigital number, since it uses as much as digits as its factorization.

28851616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901623 (or 901615 counting only the distinct ones).

The product of its digits is 23040, while the sum is 37.

The square root of 28851616 is about 5371.3700300761. The cubic root of 28851616 is about 306.7067832417.

The spelling of 28851616 in words is "twenty-eight million, eight hundred fifty-one thousand, six hundred sixteen".