747398440 has 64 divisors (see below), whose sum is σ = 1831248000. Its totient is φ = 273450240.

The previous prime is 747398423. The next prime is 747398447. The reversal of 747398440 is 44893747.

It is a super-2 number, since 2×747398440² = 1117208856228867200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (747398447) 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, 5085 + ... + 38995.

It is an arithmetic number, because the mean of its divisors is an integer number (28613250).

Almost surely, 2^747398440 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 747398440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (915624000).

747398440 is an abundant number, since it is smaller than the sum of its proper divisors (1083849560).

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

747398440 is a wasteful number, since it uses less digits than its factorization.

747398440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33970 (or 33966 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 46.

The square root of 747398440 is about 27338.5888443424. The cubic root of 747398440 is about 907.5085575720.

The spelling of 747398440 in words is "seven hundred forty-seven million, three hundred ninety-eight thousand, four hundred forty".