402422042 has 12 divisors (see below), whose sum is σ = 663497898. Its totient is φ = 182919000.

The previous prime is 402422029. The next prime is 402422123. The reversal of 402422042 is 240224204.

It can be written as a sum of positive squares in only one way, i.e., 391604521 + 10817521 = 19789^2 + 3289^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 831209 + ... + 831692.

Almost surely, 2^402422042 is an apocalyptic number.

402422042 is a deficient number, since it is larger than the sum of its proper divisors (261075856).

402422042 is a wasteful number, since it uses less digits than its factorization.

402422042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662925 (or 1662914 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 402422042 is about 20060.4596657205. The cubic root of 402422042 is about 738.2904546785.

Adding to 402422042 its reverse (240224204), we get a palindrome (642646246).

The spelling of 402422042 in words is "four hundred two million, four hundred twenty-two thousand, forty-two".