76405457 has 4 divisors (see below), whose sum is σ = 76438896. Its totient is φ = 76372020.

The previous prime is 76405423. The next prime is 76405477. The reversal of 76405457 is 75450467.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75450467 = 281 ⋅268507.

It is a cyclic number.

It is not a de Polignac number, because 76405457 - 2¹⁸ = 76143313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 76405457.

It is not an unprimeable number, because it can be changed into a prime (76405477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13019 + ... + 17952.

It is an arithmetic number, because the mean of its divisors is an integer number (19109724).

Almost surely, 2^76405457 is an apocalyptic number.

It is an amenable number.

76405457 is a deficient number, since it is larger than the sum of its proper divisors (33439).

76405457 is a wasteful number, since it uses less digits than its factorization.

76405457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33438.

The product of its (nonzero) digits is 117600, while the sum is 38.

The square root of 76405457 is about 8741.0215078102. The cubic root of 76405457 is about 424.3342878892.

The spelling of 76405457 in words is "seventy-six million, four hundred five thousand, four hundred fifty-seven".