922989978 has 40 divisors (see below), whose sum is σ = 2070051060. Its totient is φ = 307385280.

The previous prime is 922989973. The next prime is 922989983. The reversal of 922989978 is 879989229.

It is an interprime number because it is at equal distance from previous prime (922989973) and next prime (922989983).

It can be written as a sum of positive squares in 2 ways, for example, as 853983729 + 69006249 = 29223^2 + 8307^2 .

It is not an unprimeable number, because it can be changed into a prime (922989973) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 258888 + ... + 262428.

Almost surely, 2^922989978 is an apocalyptic number.

922989978 is an abundant number, since it is smaller than the sum of its proper divisors (1147061082).

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

922989978 is a wasteful number, since it uses less digits than its factorization.

922989978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5164 (or 5155 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 63.

The square root of 922989978 is about 30380.7501224048. The cubic root of 922989978 is about 973.6413169936.

The spelling of 922989978 in words is "nine hundred twenty-two million, nine hundred eighty-nine thousand, nine hundred seventy-eight".