402440442 has 16 divisors (see below), whose sum is σ = 806164032. Its totient is φ = 133932960.

The previous prime is 402440429. The next prime is 402440449. The reversal of 402440442 is 244044204.

It is not an unprimeable number, because it can be changed into a prime (402440449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49363 + ... + 56934.

It is an arithmetic number, because the mean of its divisors is an integer number (50385252).

Almost surely, 2^402440442 is an apocalyptic number.

402440442 is an abundant number, since it is smaller than the sum of its proper divisors (403723590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402440442 is a wasteful number, since it uses less digits than its factorization.

402440442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106933.

The product of its (nonzero) digits is 4096, while the sum is 24.

The square root of 402440442 is about 20060.9182740970. The cubic root of 402440442 is about 738.3017068267.

Adding to 402440442 its reverse (244044204), we get a palindrome (646484646).

The spelling of 402440442 in words is "four hundred two million, four hundred forty thousand, four hundred forty-two".