22078628 has 60 divisors (see below), whose sum is σ = 47348700. Its totient is φ = 8944320.

The previous prime is 22078619. The next prime is 22078633. The reversal of 22078628 is 82687022.

It can be written as a sum of positive squares in 2 ways, for example, as 7086244 + 14992384 = 2662^2 + 3872^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 761318 + ... + 761346.

It is an arithmetic number, because the mean of its divisors is an integer number (789145).

Almost surely, 2^22078628 is an apocalyptic number.

It is an amenable number.

22078628 is an abundant number, since it is smaller than the sum of its proper divisors (25270072).

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

22078628 is a wasteful number, since it uses less digits than its factorization.

22078628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 55 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 22078628 is about 4698.7900570253. The cubic root of 22078628 is about 280.5373524524.

The spelling of 22078628 in words is "twenty-two million, seventy-eight thousand, six hundred twenty-eight".