28773324 has 18 divisors (see below), whose sum is σ = 72732660. Its totient is φ = 9591096.

The previous prime is 28773323. The next prime is 28773331. The reversal of 28773324 is 42337782.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 799259 = 28773324 / (2 + 8 + 7 + 7 + 3 + 3 + 2 + 4).

It is not an unprimeable number, because it can be changed into a prime (28773323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 399594 + ... + 399665.

Almost surely, 2^28773324 is an apocalyptic number.

It is an amenable number.

28773324 is an abundant number, since it is smaller than the sum of its proper divisors (43959336).

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

28773324 is a wasteful number, since it uses less digits than its factorization.

28773324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799269 (or 799264 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 28773324 is about 5364.0771806528. The cubic root of 28773324 is about 306.4291045076.

The spelling of 28773324 in words is "twenty-eight million, seven hundred seventy-three thousand, three hundred twenty-four".