749456778 has 16 divisors (see below), whose sum is σ = 1713044160. Its totient is φ = 214130496.

The previous prime is 749456749. The next prime is 749456779. The reversal of 749456778 is 877654947.

It is not an unprimeable number, because it can be changed into a prime (749456779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8922063 + ... + 8922146.

It is an arithmetic number, because the mean of its divisors is an integer number (107065260).

Almost surely, 2^749456778 is an apocalyptic number.

749456778 is an abundant number, since it is smaller than the sum of its proper divisors (963587382).

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

749456778 is a wasteful number, since it uses less digits than its factorization.

749456778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17844221.

The product of its digits is 11854080, while the sum is 57.

The square root of 749456778 is about 27376.2082473085. The cubic root of 749456778 is about 908.3408879058.

The spelling of 749456778 in words is "seven hundred forty-nine million, four hundred fifty-six thousand, seven hundred seventy-eight".