28772316 has 36 divisors (see below), whose sum is σ = 73297224. Its totient is φ = 9516000.

The previous prime is 28772299. The next prime is 28772323. The reversal of 28772316 is 61327782.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1666 + ... + 7766.

It is an arithmetic number, because the mean of its divisors is an integer number (2036034).

Almost surely, 2^28772316 is an apocalyptic number.

It is an amenable number.

28772316 is an abundant number, since it is smaller than the sum of its proper divisors (44524908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28772316 is a wasteful number, since it uses less digits than its factorization.

28772316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6242 (or 6237 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 28772316 is about 5363.9832214503. The cubic root of 28772316 is about 306.4255261452.

The spelling of 28772316 in words is "twenty-eight million, seven hundred seventy-two thousand, three hundred sixteen".