747630520 has 128 divisors (see below), whose sum is σ = 2080391040. Its totient is φ = 235468800.

The previous prime is 747630511. The next prime is 747630593. The reversal of 747630520 is 25036747.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1066170 + ... + 1066870.

It is an arithmetic number, because the mean of its divisors is an integer number (16253055).

Almost surely, 2^747630520 is an apocalyptic number.

747630520 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 747630520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1040195520).

747630520 is an abundant number, since it is smaller than the sum of its proper divisors (1332760520).

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

747630520 is a wasteful number, since it uses less digits than its factorization.

747630520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025 (or 1021 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 747630520 is about 27342.8330646259. The cubic root of 747630520 is about 907.6024801612.

The spelling of 747630520 in words is "seven hundred forty-seven million, six hundred thirty thousand, five hundred twenty".