392774198089 has 81 divisors (see below), whose sum is σ = 507043514421. Its totient is φ = 303230753280.

The previous prime is 392774198071. The next prime is 392774198189. The reversal of 392774198089 is 980891477293.

The square root of 392774198089 is 626717.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 71761301689 + 321012896400 = 267883^2 + 566580^2 .

It is not a de Polignac number, because 392774198089 - 2⁷ = 392774197961 is a prime.

It is a super-2 number, since 2×392774198089² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (392774198029) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 4049218489 + ... + 4049218585.

Almost surely, 2^392774198089 is an apocalyptic number.

392774198089 is the 626717-th square number.

392774198089 is the 313359-th centered octagonal number.

It is an amenable number.

392774198089 is a deficient number, since it is larger than the sum of its proper divisors (114269316332).

392774198089 is an frugal number, since it uses more digits than its factorization.

392774198089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 67.

The spelling of 392774198089 in words is "three hundred ninety-two billion, seven hundred seventy-four million, one hundred ninety-eight thousand, eighty-nine".