28791672 has 64 divisors (see below), whose sum is σ = 88596480. Its totient is φ = 7592832.

The previous prime is 28791671. The next prime is 28791677. The reversal of 28791672 is 27619782.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28791671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4408 + ... + 8775.

It is an arithmetic number, because the mean of its divisors is an integer number (1384320).

Almost surely, 2^28791672 is an apocalyptic number.

It is an amenable number.

28791672 is an abundant number, since it is smaller than the sum of its proper divisors (59804808).

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

28791672 is a wasteful number, since it uses less digits than its factorization.

28791672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13212 (or 13208 counting only the distinct ones).

The product of its digits is 84672, while the sum is 42.

The square root of 28791672 is about 5365.7871743110. The cubic root of 28791672 is about 306.4942246232.

The spelling of 28791672 in words is "twenty-eight million, seven hundred ninety-one thousand, six hundred seventy-two".