402264409 has 4 divisors (see below), whose sum is σ = 423436240. Its totient is φ = 381092580.

The previous prime is 402264323. The next prime is 402264437. The reversal of 402264409 is 904462204.

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.

It is a cyclic number.

It is not a de Polignac number, because 402264409 - 2⁷ = 402264281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402264479) 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, 10585887 + ... + 10585924.

It is an arithmetic number, because the mean of its divisors is an integer number (105859060).

Almost surely, 2^402264409 is an apocalyptic number.

It is an amenable number.

402264409 is a deficient number, since it is larger than the sum of its proper divisors (21171831).

402264409 is a wasteful number, since it uses less digits than its factorization.

402264409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21171830.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 402264409 is about 20056.5303330362. The cubic root of 402264409 is about 738.1940433441.

The spelling of 402264409 in words is "four hundred two million, two hundred sixty-four thousand, four hundred nine".