720475380 has 36 divisors (see below), whose sum is σ = 2185442532. Its totient is φ = 192126720.

The previous prime is 720475337. The next prime is 720475397. The reversal of 720475380 is 83574027.

720475380 is a `hidden beast` number, since 7 + 204 + 75 + 380 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 270865764 + 449609616 = 16458^2 + 21204^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×720475380² = 1038169546372288800, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2001141 + ... + 2001500.

It is an arithmetic number, because the mean of its divisors is an integer number (60706737).

Almost surely, 2^720475380 is an apocalyptic number.

It is an amenable number.

720475380 is an abundant number, since it is smaller than the sum of its proper divisors (1464967152).

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

720475380 is a wasteful number, since it uses less digits than its factorization.

720475380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4002656 (or 4002651 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 720475380 is about 26841.6724516190. The cubic root of 720475380 is about 896.4781624134.

It can be divided in two parts, 720 and 475380, that added together give a square (476100 = 690²).

The spelling of 720475380 in words is "seven hundred twenty million, four hundred seventy-five thousand, three hundred eighty".