749227680 has 72 divisors (see below), whose sum is σ = 2556744372. Its totient is φ = 199793664.

The previous prime is 749227679. The next prime is 749227729. The reversal of 749227680 is 86722947.

It can be written as a sum of positive squares in 2 ways, for example, as 749226384 + 1296 = 27372^2 + 36^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×749227680² = 1122684232956364800, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 258709 + ... + 261588.

Almost surely, 2^749227680 is an apocalyptic number.

It is an amenable number.

749227680 is an abundant number, since it is smaller than the sum of its proper divisors (1807516692).

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

749227680 is a wasteful number, since it uses less digits than its factorization.

749227680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520318 (or 520307 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 749227680 is about 27372.0236738170. The cubic root of 749227680 is about 908.2483229553.

The spelling of 749227680 in words is "seven hundred forty-nine million, two hundred twenty-seven thousand, six hundred eighty".