28904712 has 16 divisors (see below), whose sum is σ = 72261840. Its totient is φ = 9634896.

The previous prime is 28904647. The next prime is 28904717. The reversal of 28904712 is 21740982.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28904717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 602158 + ... + 602205.

It is an arithmetic number, because the mean of its divisors is an integer number (4516365).

Almost surely, 2^28904712 is an apocalyptic number.

It is an amenable number.

28904712 is an abundant number, since it is smaller than the sum of its proper divisors (43357128).

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

28904712 is a wasteful number, since it uses less digits than its factorization.

28904712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204372 (or 1204368 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 28904712 is about 5376.3102589043. The cubic root of 28904712 is about 306.8948134234.

The spelling of 28904712 in words is "twenty-eight million, nine hundred four thousand, seven hundred twelve".