720525840 has 40 divisors (see below), whose sum is σ = 2233630848. Its totient is φ = 192140160.

The previous prime is 720525833. The next prime is 720525859. The reversal of 720525840 is 48525027.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×720525840² = 1038314972215411200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1500856 + ... + 1501335.

Almost surely, 2^720525840 is an apocalyptic number.

It is an amenable number.

720525840 is an abundant number, since it is smaller than the sum of its proper divisors (1513105008).

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

720525840 is a wasteful number, since it uses less digits than its factorization.

720525840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3002207 (or 3002201 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 720525840 is about 26842.6123914942. The cubic root of 720525840 is about 896.4990908325.

The spelling of 720525840 in words is "seven hundred twenty million, five hundred twenty-five thousand, eight hundred forty".