28745672 has 16 divisors (see below), whose sum is σ = 55152240. Its totient is φ = 14038416.

The previous prime is 28745671. The next prime is 28745687. The reversal of 28745672 is 27654782.

It is not an unprimeable number, because it can be changed into a prime (28745671) 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, 41438 + ... + 42125.

It is an arithmetic number, because the mean of its divisors is an integer number (3447015).

Almost surely, 2^28745672 is an apocalyptic number.

It is an amenable number.

28745672 is a deficient number, since it is larger than the sum of its proper divisors (26406568).

28745672 is a wasteful number, since it uses less digits than its factorization.

28745672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83612 (or 83608 counting only the distinct ones).

The product of its digits is 188160, while the sum is 41.

The square root of 28745672 is about 5361.4990441107. The cubic root of 28745672 is about 306.3309106223.

The spelling of 28745672 in words is "twenty-eight million, seven hundred forty-five thousand, six hundred seventy-two".