738408640 has 28 divisors (see below), whose sum is σ = 1758336336. Its totient is φ = 295363328.

The previous prime is 738408631. The next prime is 738408653. The reversal of 738408640 is 46804837.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 738408593 and 738408602.

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, 1153444 + ... + 1154083.

Almost surely, 2^738408640 is an apocalyptic number.

It is an amenable number.

738408640 is an abundant number, since it is smaller than the sum of its proper divisors (1019927696).

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

738408640 is a wasteful number, since it uses less digits than its factorization.

738408640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2307544 (or 2307534 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 738408640 is about 27173.6754967008. The cubic root of 738408640 is about 903.8553296567.

The spelling of 738408640 in words is "seven hundred thirty-eight million, four hundred eight thousand, six hundred forty".