747323820 has 240 divisors, whose sum is σ = 2529128448. Its totient is φ = 184187520.

The previous prime is 747323807. The next prime is 747323861. The reversal of 747323820 is 28323747.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

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 79 ways as a sum of consecutive naturals, for example, 1154737 + ... + 1155383.

Almost surely, 2^747323820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 747323820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1264564224).

747323820 is an abundant number, since it is smaller than the sum of its proper divisors (1781804628).

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

747323820 is a wasteful number, since it uses less digits than its factorization.

747323820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722 (or 711 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 747323820 is about 27337.2240726816. The cubic root of 747323820 is about 907.4783547873.

The spelling of 747323820 in words is "seven hundred forty-seven million, three hundred twenty-three thousand, eight hundred twenty".