747385840 has 20 divisors (see below), whose sum is σ = 1737672264. Its totient is φ = 298954304.

The previous prime is 747385813. The next prime is 747385901. The reversal of 747385840 is 48583747.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4671082 + ... + 4671241.

Almost surely, 2^747385840 is an apocalyptic number.

It is an amenable number.

747385840 is an abundant number, since it is smaller than the sum of its proper divisors (990286424).

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

747385840 is a wasteful number, since it uses less digits than its factorization.

747385840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9342336 (or 9342330 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 46.

The square root of 747385840 is about 27338.3583998747. The cubic root of 747385840 is about 907.5034578057.

It can be divided in two parts, 747385 and 840, that added together give a square (748225 = 865²).

The spelling of 747385840 in words is "seven hundred forty-seven million, three hundred eighty-five thousand, eight hundred forty".