28874790 has 48 divisors (see below), whose sum is σ = 85801248. Its totient is φ = 6599808.

The previous prime is 28874761. The next prime is 28874803. The reversal of 28874790 is 9747882.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 22287 + ... + 23546.

It is an arithmetic number, because the mean of its divisors is an integer number (1787526).

Almost surely, 2^28874790 is an apocalyptic number.

28874790 is an abundant number, since it is smaller than the sum of its proper divisors (56926458).

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

28874790 is a wasteful number, since it uses less digits than its factorization.

28874790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45853 (or 45850 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 28874790 is about 5373.5267748472. The cubic root of 28874790 is about 306.7888782489.

It can be divided in two parts, 288 and 74790, that added together give a triangular number (75078 = T₃₈₇).

The spelling of 28874790 in words is "twenty-eight million, eight hundred seventy-four thousand, seven hundred ninety".