28770324 has 48 divisors (see below), whose sum is σ = 77547456. Its totient is φ = 8204800.

The previous prime is 28770323. The next prime is 28770331. The reversal of 28770324 is 42307782.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28770323) 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, 4167 + ... + 8654.

It is an arithmetic number, because the mean of its divisors is an integer number (1615572).

Almost surely, 2^28770324 is an apocalyptic number.

It is an amenable number.

28770324 is an abundant number, since it is smaller than the sum of its proper divisors (48777132).

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

28770324 is a wasteful number, since it uses less digits than its factorization.

28770324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12856 (or 12854 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 28770324 is about 5363.7975353289. The cubic root of 28770324 is about 306.4184543737.

The spelling of 28770324 in words is "twenty-eight million, seven hundred seventy thousand, three hundred twenty-four".