402242845 has 8 divisors (see below), whose sum is σ = 490604760. Its totient is φ = 316518720.

The previous prime is 402242839. The next prime is 402242857. The reversal of 402242845 is 548242204.

It can be written as a sum of positive squares in 4 ways, for example, as 8696601 + 393546244 = 2949^2 + 19838^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-402242845 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 659110 + ... + 659719.

It is an arithmetic number, because the mean of its divisors is an integer number (61325595).

Almost surely, 2^402242845 is an apocalyptic number.

It is an amenable number.

402242845 is a deficient number, since it is larger than the sum of its proper divisors (88361915).

402242845 is a wasteful number, since it uses less digits than its factorization.

402242845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318895.

The product of its (nonzero) digits is 20480, while the sum is 31.

The square root of 402242845 is about 20055.9927453118. The cubic root of 402242845 is about 738.1808524342.

The spelling of 402242845 in words is "four hundred two million, two hundred forty-two thousand, eight hundred forty-five".