28739916 has 18 divisors (see below), whose sum is σ = 72648212. Its totient is φ = 9579960.

The previous prime is 28739891. The next prime is 28739917. The reversal of 28739916 is 61993782.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (28739917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 399130 + ... + 399201.

Almost surely, 2^28739916 is an apocalyptic number.

It is an amenable number.

28739916 is an abundant number, since it is smaller than the sum of its proper divisors (43908296).

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

28739916 is a wasteful number, since it uses less digits than its factorization.

28739916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798341 (or 798336 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 28739916 is about 5360.9622270633. The cubic root of 28739916 is about 306.3104628087.

The spelling of 28739916 in words is "twenty-eight million, seven hundred thirty-nine thousand, nine hundred sixteen".