720691492 has 12 divisors (see below), whose sum is σ = 1262096640. Its totient is φ = 360092456.

The previous prime is 720691487. The next prime is 720691493. The reversal of 720691492 is 294196027.

It is not an unprimeable number, because it can be changed into a prime (720691493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56848 + ... + 68359.

It is an arithmetic number, because the mean of its divisors is an integer number (105174720).

Almost surely, 2^720691492 is an apocalyptic number.

It is an amenable number.

720691492 is a deficient number, since it is larger than the sum of its proper divisors (541405148).

720691492 is a wasteful number, since it uses less digits than its factorization.

720691492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126650 (or 126648 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 720691492 is about 26845.6978303787. The cubic root of 720691492 is about 896.5677885714.

The spelling of 720691492 in words is "seven hundred twenty million, six hundred ninety-one thousand, four hundred ninety-two".