747204640 has 384 divisors, whose sum is σ = 2380976640. Its totient is φ = 214990848.

The previous prime is 747204629. The next prime is 747204643. The reversal of 747204640 is 46402747.

747204640 is nontrivially palindromic in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 747204596 and 747204605.

It is not an unprimeable number, because it can be changed into a prime (747204643) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10235644 + ... + 10235716.

It is an arithmetic number, because the mean of its divisors is an integer number (6200460).

Almost surely, 2^747204640 is an apocalyptic number.

747204640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 747204640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1190488320).

747204640 is an abundant number, since it is smaller than the sum of its proper divisors (1633772000).

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

747204640 is a wasteful number, since it uses less digits than its factorization.

747204640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 34.

The square root of 747204640 is about 27335.0441741000. The cubic root of 747204640 is about 907.4301119698.

The spelling of 747204640 in words is "seven hundred forty-seven million, two hundred four thousand, six hundred forty".