400304142 has 24 divisors (see below), whose sum is σ = 991229616. Its totient is φ = 114372576.

The previous prime is 400304131. The next prime is 400304161. The reversal of 400304142 is 241403004.

It is a super-2 number, since 2×400304142² = 320486812204712328, 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 an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1588383 + ... + 1588634.

It is an arithmetic number, because the mean of its divisors is an integer number (41301234).

Almost surely, 2^400304142 is an apocalyptic number.

400304142 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

400304142 is an abundant number, since it is smaller than the sum of its proper divisors (590925474).

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

400304142 is a wasteful number, since it uses less digits than its factorization.

400304142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3177032 (or 3177029 counting only the distinct ones).

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

The square root of 400304142 is about 20007.6021051999. The cubic root of 400304142 is about 736.9929972020.

Adding to 400304142 its reverse (241403004), we get a palindrome (641707146).

The spelling of 400304142 in words is "four hundred million, three hundred four thousand, one hundred forty-two".