749427778 has 24 divisors (see below), whose sum is σ = 1239038640. Its totient is φ = 339708600.

The previous prime is 749427769. The next prime is 749427781. The reversal of 749427778 is 877724947.

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, 87633 + ... + 95803.

It is an arithmetic number, because the mean of its divisors is an integer number (51626610).

Almost surely, 2^749427778 is an apocalyptic number.

749427778 is a deficient number, since it is larger than the sum of its proper divisors (489610862).

749427778 is a wasteful number, since it uses less digits than its factorization.

749427778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8574 (or 8563 counting only the distinct ones).

The product of its digits is 5531904, while the sum is 55.

The square root of 749427778 is about 27375.6785851968. The cubic root of 749427778 is about 908.3291717641.

The spelling of 749427778 in words is "seven hundred forty-nine million, four hundred twenty-seven thousand, seven hundred seventy-eight".