747643428 has 72 divisors (see below), whose sum is σ = 2253783168. Its totient is φ = 204323328.

The previous prime is 747643427. The next prime is 747643433. The reversal of 747643428 is 824346747.

It is not an unprimeable number, because it can be changed into a prime (747643427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58701 + ... + 70292.

It is an arithmetic number, because the mean of its divisors is an integer number (31302544).

Almost surely, 2^747643428 is an apocalyptic number.

It is an amenable number.

747643428 is an abundant number, since it is smaller than the sum of its proper divisors (1506139740).

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

747643428 is a wasteful number, since it uses less digits than its factorization.

747643428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129033 (or 129028 counting only the distinct ones).

The product of its digits is 903168, while the sum is 45.

The square root of 747643428 is about 27343.0691035224. The cubic root of 747643428 is about 907.6077034478.

The spelling of 747643428 in words is "seven hundred forty-seven million, six hundred forty-three thousand, four hundred twenty-eight".