456402391 has 4 divisors (see below), whose sum is σ = 456920152. Its totient is φ = 455884632.

The previous prime is 456402389. The next prime is 456402421. The reversal of 456402391 is 193204654.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 456402391 - 2¹ = 456402389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (456402091) 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, 257556 + ... + 259321.

It is an arithmetic number, because the mean of its divisors is an integer number (114230038).

Almost surely, 2^456402391 is an apocalyptic number.

456402391 is a deficient number, since it is larger than the sum of its proper divisors (517761).

456402391 is an equidigital number, since it uses as much as digits as its factorization.

456402391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517760.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 456402391 is about 21363.5762689677. The cubic root of 456402391 is about 769.9265635255.

The spelling of 456402391 in words is "four hundred fifty-six million, four hundred two thousand, three hundred ninety-one".