402320142 has 32 divisors (see below), whose sum is σ = 1021766400. Its totient is φ = 114948504.

The previous prime is 402320131. The next prime is 402320143. The reversal of 402320142 is 241023204.

It is a super-2 number, since 2×402320142² = 323722993317800328, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402320143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 531792 + ... + 532547.

It is an arithmetic number, because the mean of its divisors is an integer number (31930200).

Almost surely, 2^402320142 is an apocalyptic number.

402320142 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

402320142 is an abundant number, since it is smaller than the sum of its proper divisors (619446258).

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

402320142 is a wasteful number, since it uses less digits than its factorization.

402320142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064357 (or 1064351 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 402320142 is about 20057.9196827587. The cubic root of 402320142 is about 738.2281335825.

Adding to 402320142 its reverse (241023204), we get a palindrome (643343346).

The spelling of 402320142 in words is "four hundred two million, three hundred twenty thousand, one hundred forty-two".