28770672 has 40 divisors (see below), whose sum is σ = 84942976. Its totient is φ = 8220096.

The previous prime is 28770667. The next prime is 28770673. The reversal of 28770672 is 27607782.

It is a self number, because there is not a number n which added to its sum of digits gives 28770672.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28770673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42478 + ... + 43149.

Almost surely, 2^28770672 is an apocalyptic number.

It is an amenable number.

28770672 is an abundant number, since it is smaller than the sum of its proper divisors (56172304).

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

28770672 is a wasteful number, since it uses less digits than its factorization.

28770672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85645 (or 85639 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 39.

The square root of 28770672 is about 5363.8299749340. The cubic root of 28770672 is about 306.4196898272.

The spelling of 28770672 in words is "twenty-eight million, seven hundred seventy thousand, six hundred seventy-two".