402042330 has 24 divisors (see below), whose sum is σ = 1045310292. Its totient is φ = 107211264.

The previous prime is 402042301. The next prime is 402042331. The reversal of 402042330 is 33240204.

It can be written as a sum of positive squares in 2 ways, for example, as 372914721 + 29127609 = 19311^2 + 5397^2 .

It is a super-2 number, since 2×402042330² = 323276070223657800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (402042331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2233479 + ... + 2233658.

Almost surely, 2^402042330 is an apocalyptic number.

402042330 is an abundant number, since it is smaller than the sum of its proper divisors (643267962).

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

402042330 is a wasteful number, since it uses less digits than its factorization.

402042330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4467150 (or 4467147 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 402042330 is about 20050.9932422312. The cubic root of 402042330 is about 738.0581728661.

Adding to 402042330 its reverse (33240204), we get a palindrome (435282534).

The spelling of 402042330 in words is "four hundred two million, forty-two thousand, three hundred thirty".