28325778 has 16 divisors (see below), whose sum is σ = 61009536. Its totient is φ = 8715600.

The previous prime is 28325749. The next prime is 28325821. The reversal of 28325778 is 87752382.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181498 + ... + 181653.

It is an arithmetic number, because the mean of its divisors is an integer number (3813096).

Almost surely, 2^28325778 is an apocalyptic number.

28325778 is an abundant number, since it is smaller than the sum of its proper divisors (32683758).

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

28325778 is a wasteful number, since it uses less digits than its factorization.

28325778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363169.

The product of its digits is 188160, while the sum is 42.

The square root of 28325778 is about 5322.1967269164. The cubic root of 28325778 is about 304.8320422566.

The spelling of 28325778 in words is "twenty-eight million, three hundred twenty-five thousand, seven hundred seventy-eight".