731762138 has 4 divisors (see below), whose sum is σ = 1097643210. Its totient is φ = 365881068.

The previous prime is 731762081. The next prime is 731762159. The reversal of 731762138 is 831267137.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 576336049 + 155426089 = 24007^2 + 12467^2 .

It is a super-2 number, since 2×731762138² = 1070951653220662088, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 182940533 + ... + 182940536.

Almost surely, 2^731762138 is an apocalyptic number.

731762138 is a deficient number, since it is larger than the sum of its proper divisors (365881072).

731762138 is a wasteful number, since it uses less digits than its factorization.

731762138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365881071.

The product of its digits is 42336, while the sum is 38.

The square root of 731762138 is about 27051.1023435275. The cubic root of 731762138 is about 901.1352497114.

The spelling of 731762138 in words is "seven hundred thirty-one million, seven hundred sixty-two thousand, one hundred thirty-eight".