402042442 has 16 divisors (see below), whose sum is σ = 610428960. Its totient is φ = 198577008.

The previous prime is 402042391. The next prime is 402042493. The reversal of 402042442 is 244240204.

It is an interprime number because it is at equal distance from previous prime (402042391) and next prime (402042493).

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, 78628 + ... + 83584.

It is an arithmetic number, because the mean of its divisors is an integer number (38151810).

Almost surely, 2^402042442 is an apocalyptic number.

402042442 is a deficient number, since it is larger than the sum of its proper divisors (208386518).

402042442 is a wasteful number, since it uses less digits than its factorization.

402042442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5445.

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 402042442 is about 20050.9960351101. The cubic root of 402042442 is about 738.0582414016.

Adding to 402042442 its reverse (244240204), we get a palindrome (646282646).

The spelling of 402042442 in words is "four hundred two million, forty-two thousand, four hundred forty-two".