747540640 has 192 divisors, whose sum is σ = 2250436608. Its totient is φ = 227865600.

The previous prime is 747540631. The next prime is 747540653. The reversal of 747540640 is 46045747.

It is a self number, because there is not a number n which added to its sum of digits gives 747540640.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 578395 + ... + 579685.

It is an arithmetic number, because the mean of its divisors is an integer number (11721024).

Almost surely, 2^747540640 is an apocalyptic number.

747540640 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 747540640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1125218304).

747540640 is an abundant number, since it is smaller than the sum of its proper divisors (1502895968).

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

747540640 is a wasteful number, since it uses less digits than its factorization.

747540640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371 (or 1363 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 37.

The square root of 747540640 is about 27341.1894401103. The cubic root of 747540640 is about 907.5661081040.

The spelling of 747540640 in words is "seven hundred forty-seven million, five hundred forty thousand, six hundred forty".