720538632 has 64 divisors (see below), whose sum is σ = 2183457600. Its totient is φ = 218344320.

The previous prime is 720538631. The next prime is 720538681. The reversal of 720538632 is 236835027.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (720538631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149253 + ... + 154004.

It is an arithmetic number, because the mean of its divisors is an integer number (34116525).

Almost surely, 2^720538632 is an apocalyptic number.

720538632 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

720538632 is an abundant number, since it is smaller than the sum of its proper divisors (1462918968).

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

720538632 is a wasteful number, since it uses less digits than its factorization.

720538632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303283 (or 303273 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 720538632 is about 26842.8506682878. The cubic root of 720538632 is about 896.5043961932.

The spelling of 720538632 in words is "seven hundred twenty million, five hundred thirty-eight thousand, six hundred thirty-two".