402774427 has 8 divisors (see below), whose sum is σ = 439601472. Its totient is φ = 365982600.

The previous prime is 402774419. The next prime is 402774431. The reversal of 402774427 is 724477204.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 402774427 - 2³ = 402774419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402774487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18928 + ... + 34114.

It is an arithmetic number, because the mean of its divisors is an integer number (54950184).

Almost surely, 2^402774427 is an apocalyptic number.

402774427 is a deficient number, since it is larger than the sum of its proper divisors (36827045).

402774427 is a wasteful number, since it uses less digits than its factorization.

402774427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17609.

The product of its (nonzero) digits is 87808, while the sum is 37.

The square root of 402774427 is about 20069.2408177290. The cubic root of 402774427 is about 738.5058890183.

The spelling of 402774427 in words is "four hundred two million, seven hundred seventy-four thousand, four hundred twenty-seven".