402311442 has 32 divisors (see below), whose sum is σ = 881213760. Its totient is φ = 121688640.

The previous prime is 402311411. The next prime is 402311447. The reversal of 402311442 is 244113204.

It is not an unprimeable number, because it can be changed into a prime (402311447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39109 + ... + 48312.

It is an arithmetic number, because the mean of its divisors is an integer number (27537930).

Almost surely, 2^402311442 is an apocalyptic number.

402311442 is an abundant number, since it is smaller than the sum of its proper divisors (478902318).

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

402311442 is a wasteful number, since it uses less digits than its factorization.

402311442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87498.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 402311442 is about 20057.7028096440. The cubic root of 402311442 is about 738.2228122555. Note that the first 3 decimals are identical.

Adding to 402311442 its reverse (244113204), we get a palindrome (646424646).

It can be divided in two parts, 402311 and 442, that added together give a triangular number (402753 = T₈₉₇).

The spelling of 402311442 in words is "four hundred two million, three hundred eleven thousand, four hundred forty-two".