22978602 has 12 divisors (see below), whose sum is σ = 49787010. Its totient is φ = 7659528.

The previous prime is 22978597. The next prime is 22978603. The reversal of 22978602 is 20687922.

It can be written as a sum of positive squares in only one way, i.e., 14907321 + 8071281 = 3861^2 + 2841^2 .

It is a super-2 number, since 2×22978602² = 1056032299748808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22978603) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 638277 + ... + 638312.

Almost surely, 2^22978602 is an apocalyptic number.

22978602 is an abundant number, since it is smaller than the sum of its proper divisors (26808408).

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

22978602 is a wasteful number, since it uses less digits than its factorization.

22978602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276597 (or 1276594 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 22978602 is about 4793.6001084780. The cubic root of 22978602 is about 284.2984777723.

The spelling of 22978602 in words is "twenty-two million, nine hundred seventy-eight thousand, six hundred two".