720456540 has 24 divisors (see below), whose sum is σ = 2017278480. Its totient is φ = 192121728.

The previous prime is 720456521. The next prime is 720456547. The reversal of 720456540 is 45654027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720456547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6003745 + ... + 6003864.

It is an arithmetic number, because the mean of its divisors is an integer number (84053270).

Almost surely, 2^720456540 is an apocalyptic number.

It is an amenable number.

720456540 is an abundant number, since it is smaller than the sum of its proper divisors (1296821940).

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

720456540 is a wasteful number, since it uses less digits than its factorization.

720456540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12007621 (or 12007619 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 33.

The square root of 720456540 is about 26841.3215024894. The cubic root of 720456540 is about 896.4703482228.

The spelling of 720456540 in words is "seven hundred twenty million, four hundred fifty-six thousand, five hundred forty".