28770448 has 30 divisors (see below), whose sum is σ = 64845366. Its totient is φ = 12329856.

The previous prime is 28770437. The next prime is 28770451. The reversal of 28770448 is 84407782.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 21086464 + 7683984 = 4592^2 + 2772^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28770448.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17565 + ... + 19132.

Almost surely, 2^28770448 is an apocalyptic number.

28770448 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28770448 is an abundant number, since it is smaller than the sum of its proper divisors (36074918).

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

28770448 is a wasteful number, since it uses less digits than its factorization.

28770448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36719 (or 36706 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 40.

The square root of 28770448 is about 5363.8090942911. The cubic root of 28770448 is about 306.4188945939.

The spelling of 28770448 in words is "twenty-eight million, seven hundred seventy thousand, four hundred forty-eight".