756978478 has 4 divisors (see below), whose sum is σ = 1135467720. Its totient is φ = 378489238.

The previous prime is 756978473. The next prime is 756978517. The reversal of 756978478 is 874879657.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874879657 = 257 ⋅3404201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (756978473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189244618 + ... + 189244621.

It is an arithmetic number, because the mean of its divisors is an integer number (283866930).

Almost surely, 2^756978478 is an apocalyptic number.

756978478 is a deficient number, since it is larger than the sum of its proper divisors (378489242).

756978478 is a wasteful number, since it uses less digits than its factorization.

756978478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378489241.

The product of its digits is 23708160, while the sum is 61.

The square root of 756978478 is about 27513.2418664177. The cubic root of 756978478 is about 911.3695426939.

The spelling of 756978478 in words is "seven hundred fifty-six million, nine hundred seventy-eight thousand, four hundred seventy-eight".