747744816 has 160 divisors (see below), whose sum is σ = 2459842560. Its totient is φ = 190374912.

The previous prime is 747744799. The next prime is 747744817. The reversal of 747744816 is 618447747.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (747744817) 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 31 ways as a sum of consecutive naturals, for example, 123721 + ... + 129623.

It is an arithmetic number, because the mean of its divisors is an integer number (15374016).

Almost surely, 2^747744816 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 747744816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1229921280).

747744816 is an abundant number, since it is smaller than the sum of its proper divisors (1712097744).

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

747744816 is a wasteful number, since it uses less digits than its factorization.

747744816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5963 (or 5957 counting only the distinct ones).

The product of its digits is 1053696, while the sum is 48.

The square root of 747744816 is about 27344.9230388385. The cubic root of 747744816 is about 907.6487285171.

The spelling of 747744816 in words is "seven hundred forty-seven million, seven hundred forty-four thousand, eight hundred sixteen".