731918106 has 40 divisors (see below), whose sum is σ = 1641641364. Its totient is φ = 243734400.

The previous prime is 731918087. The next prime is 731918113. The reversal of 731918106 is 601819137.

It can be written as a sum of positive squares in 2 ways, for example, as 728514081 + 3404025 = 26991^2 + 1845^2 .

It is a super-2 number, since 2×731918106² = 1071408227781254472, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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, 259906 + ... + 262706.

Almost surely, 2^731918106 is an apocalyptic number.

731918106 is an abundant number, since it is smaller than the sum of its proper divisors (909723258).

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

731918106 is a wasteful number, since it uses less digits than its factorization.

731918106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4428 (or 4419 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 731918106 is about 27053.9850299360. The cubic root of 731918106 is about 901.1992679085.

It can be divided in two parts, 7319 and 18106, that added together give a triangular number (25425 = T₂₂₅).

The spelling of 731918106 in words is "seven hundred thirty-one million, nine hundred eighteen thousand, one hundred six".