747244640 has 96 divisors (see below), whose sum is σ = 1797453504. Its totient is φ = 293529600.

The previous prime is 747244627. The next prime is 747244643. The reversal of 747244640 is 46442747.

747244640 = T₇₉ + T₈₀ + ... + T₁₆₄₈.

It is a junction number, because it is equal to n+sod(n) for n = 747244594 and 747244603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747244643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3793022 + ... + 3793218.

It is an arithmetic number, because the mean of its divisors is an integer number (18723474).

Almost surely, 2^747244640 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 747244640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (898726752).

747244640 is an abundant number, since it is smaller than the sum of its proper divisors (1050208864).

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

747244640 is a wasteful number, since it uses less digits than its factorization.

747244640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 38.

The square root of 747244640 is about 27335.7758258294. The cubic root of 747244640 is about 907.4463041233.

The spelling of 747244640 in words is "seven hundred forty-seven million, two hundred forty-four thousand, six hundred forty".