747197280 has 144 divisors (see below), whose sum is σ = 2568842640. Its totient is φ = 197766144.

The previous prime is 747197279. The next prime is 747197327. The reversal of 747197280 is 82791747.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 198294 + ... + 202026.

It is an arithmetic number, because the mean of its divisors is an integer number (17839185).

Almost surely, 2^747197280 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 747197280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1284421320).

747197280 is an abundant number, since it is smaller than the sum of its proper divisors (1821645360).

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

747197280 is a wasteful number, since it uses less digits than its factorization.

747197280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3893 (or 3882 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The square root of 747197280 is about 27334.9095480486. The cubic root of 747197280 is about 907.4271325506.

The spelling of 747197280 in words is "seven hundred forty-seven million, one hundred ninety-seven thousand, two hundred eighty".