747012820 has 24 divisors (see below), whose sum is σ = 1570820328. Its totient is φ = 298406400.

The previous prime is 747012817. The next prime is 747012821. The reversal of 747012820 is 28210747.

It can be written as a sum of positive squares in 4 ways, for example, as 1285956 + 745726864 = 1134^2 + 27308^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747012821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9321 + ... + 39760.

It is an arithmetic number, because the mean of its divisors is an integer number (65450847).

Almost surely, 2^747012820 is an apocalyptic number.

It is an amenable number.

747012820 is an abundant number, since it is smaller than the sum of its proper divisors (823807508).

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

747012820 is a wasteful number, since it uses less digits than its factorization.

747012820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49851 (or 49849 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 747012820 is about 27331.5352660622. The cubic root of 747012820 is about 907.3524544661.

The spelling of 747012820 in words is "seven hundred forty-seven million, twelve thousand, eight hundred twenty".