22739478 has 16 divisors (see below), whose sum is σ = 45759936. Its totient is φ = 7533000.

The previous prime is 22739467. The next prime is 22739501. The reversal of 22739478 is 87493722.

It is a congruent number.

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, 10648 + ... + 12603.

It is an arithmetic number, because the mean of its divisors is an integer number (2859996).

Almost surely, 2^22739478 is an apocalyptic number.

22739478 is an abundant number, since it is smaller than the sum of its proper divisors (23020458).

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

22739478 is a wasteful number, since it uses less digits than its factorization.

22739478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23419.

The product of its digits is 169344, while the sum is 42.

The square root of 22739478 is about 4768.5928742135. The cubic root of 22739478 is about 283.3088646305.

The spelling of 22739478 in words is "twenty-two million, seven hundred thirty-nine thousand, four hundred seventy-eight".