720477820 has 24 divisors (see below), whose sum is σ = 1561811328. Its totient is φ = 278894400.

The previous prime is 720477817. The next prime is 720477887. The reversal of 720477820 is 28774027.

It is a super-2 number, since 2×720477820² = 1038176578223904800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 720477820.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 580411 + ... + 581650.

It is an arithmetic number, because the mean of its divisors is an integer number (65075472).

Almost surely, 2^720477820 is an apocalyptic number.

It is an amenable number.

720477820 is an abundant number, since it is smaller than the sum of its proper divisors (841333508).

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

720477820 is a wasteful number, since it uses less digits than its factorization.

720477820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162101 (or 1162099 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 37.

The square root of 720477820 is about 26841.7179032937. The cubic root of 720477820 is about 896.4791744324.

The spelling of 720477820 in words is "seven hundred twenty million, four hundred seventy-seven thousand, eight hundred twenty".