747339840 has 168 divisors, whose sum is σ = 2768410008. Its totient is φ = 183951360.

The previous prime is 747339821. The next prime is 747339899. The reversal of 747339840 is 48933747.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 105021504 + 642318336 = 10248^2 + 25344^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27460 + ... + 47420.

It is an arithmetic number, because the mean of its divisors is an integer number (16478631).

Almost surely, 2^747339840 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 747339840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1384205004).

747339840 is an abundant number, since it is smaller than the sum of its proper divisors (2021070168).

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

747339840 is a wasteful number, since it uses less digits than its factorization.

747339840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19997 (or 19984 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The square root of 747339840 is about 27337.5170781840. The cubic root of 747339840 is about 907.4848391247.

The spelling of 747339840 in words is "seven hundred forty-seven million, three hundred thirty-nine thousand, eight hundred forty".