731214644 has 6 divisors (see below), whose sum is σ = 1279625634. Its totient is φ = 365607320.

The previous prime is 731214641. The next prime is 731214667. The reversal of 731214644 is 446412137.

It can be written as a sum of positive squares in only one way, i.e., 502297744 + 228916900 = 22412^2 + 15130^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 731214644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731214641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 91401827 + ... + 91401834.

It is an arithmetic number, because the mean of its divisors is an integer number (213270939).

Almost surely, 2^731214644 is an apocalyptic number.

It is an amenable number.

731214644 is a deficient number, since it is larger than the sum of its proper divisors (548410990).

731214644 is a wasteful number, since it uses less digits than its factorization.

731214644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182803665 (or 182803663 counting only the distinct ones).

The product of its digits is 16128, while the sum is 32.

The square root of 731214644 is about 27040.9808254065. The cubic root of 731214644 is about 900.9104547901.

The spelling of 731214644 in words is "seven hundred thirty-one million, two hundred fourteen thousand, six hundred forty-four".