76978433 has 16 divisors (see below), whose sum is σ = 90961920. Its totient is φ = 63776976.

The previous prime is 76978423. The next prime is 76978459. The reversal of 76978433 is 33487967.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 76978433 - 2⁴ = 76978417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is not an unprimeable number, because it can be changed into a prime (76978403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25898 + ... + 28716.

It is an arithmetic number, because the mean of its divisors is an integer number (5685120).

Almost surely, 2^76978433 is an apocalyptic number.

It is an amenable number.

76978433 is a deficient number, since it is larger than the sum of its proper divisors (13983487).

76978433 is a wasteful number, since it uses less digits than its factorization.

76978433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2956.

The product of its digits is 762048, while the sum is 47.

The square root of 76978433 is about 8773.7354074533. The cubic root of 76978433 is about 425.3923629159.

The spelling of 76978433 in words is "seventy-six million, nine hundred seventy-eight thousand, four hundred thirty-three".