747987820 has 48 divisors (see below), whose sum is σ = 1669903200. Its totient is φ = 280627200.

The previous prime is 747987803. The next prime is 747987841. The reversal of 747987820 is 28789747.

It is a happy number.

747987820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28636 + ... + 48124.

It is an arithmetic number, because the mean of its divisors is an integer number (34789650).

Almost surely, 2^747987820 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 747987820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (834951600).

747987820 is an abundant number, since it is smaller than the sum of its proper divisors (921915380).

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

747987820 is a wasteful number, since it uses less digits than its factorization.

747987820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19618 (or 19616 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 52.

The square root of 747987820 is about 27349.3659889951. The cubic root of 747987820 is about 907.7470411938.

The spelling of 747987820 in words is "seven hundred forty-seven million, nine hundred eighty-seven thousand, eight hundred twenty".