747374640 has 80 divisors (see below), whose sum is σ = 2325613056. Its totient is φ = 198547200.

The previous prime is 747374611. The next prime is 747374687. The reversal of 747374640 is 46473747.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 747374592 and 747374601.

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, 59295 + ... + 70785.

Almost surely, 2^747374640 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 747374640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1162806528).

747374640 is an abundant number, since it is smaller than the sum of its proper divisors (1578238416).

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

747374640 is a wasteful number, since it uses less digits than its factorization.

747374640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11778 (or 11772 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 42.

The square root of 747374640 is about 27338.1535587172. The cubic root of 747374640 is about 907.4989246320.

The spelling of 747374640 in words is "seven hundred forty-seven million, three hundred seventy-four thousand, six hundred forty".