749172228 has 24 divisors (see below), whose sum is σ = 1997792832. Its totient is φ = 214049184.

The previous prime is 749172211. The next prime is 749172233. The reversal of 749172228 is 822271947.

It is a super-2 number, since 2×749172228² = 1122518054412967968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 749172228.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4459275 + ... + 4459442.

It is an arithmetic number, because the mean of its divisors is an integer number (83241368).

Almost surely, 2^749172228 is an apocalyptic number.

It is an amenable number.

749172228 is an abundant number, since it is smaller than the sum of its proper divisors (1248620604).

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

749172228 is a wasteful number, since it uses less digits than its factorization.

749172228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8918731 (or 8918729 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 749172228 is about 27371.0107230259. The cubic root of 749172228 is about 908.2259152459.

The spelling of 749172228 in words is "seven hundred forty-nine million, one hundred seventy-two thousand, two hundred twenty-eight".