747477440 has 56 divisors (see below), whose sum is σ = 1785561072. Its totient is φ = 298045440.

The previous prime is 747477439. The next prime is 747477443. The reversal of 747477440 is 44774747.

It is a junction number, because it is equal to n+sod(n) for n = 747477391 and 747477400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747477443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102392 + ... + 109448.

Almost surely, 2^747477440 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 747477440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (892780536).

747477440 is an abundant number, since it is smaller than the sum of its proper divisors (1038083632).

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

747477440 is a wasteful number, since it uses less digits than its factorization.

747477440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7405 (or 7395 counting only the distinct ones).

The product of its (nonzero) digits is 614656, while the sum is 44.

The square root of 747477440 is about 27340.0336503085. The cubic root of 747477440 is about 907.5405309909.

The spelling of 747477440 in words is "seven hundred forty-seven million, four hundred seventy-seven thousand, four hundred forty".