400242339 has 72 divisors (see below), whose sum is σ = 718331328. Its totient is φ = 213373440.

The previous prime is 400242331. The next prime is 400242439. The reversal of 400242339 is 933242004.

It is a happy number.

400242339 is a `hidden beast` number, since 400 + 24 + 233 + 9 = 666.

It is not a de Polignac number, because 400242339 - 2³ = 400242331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400242331) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1476774 + ... + 1477044.

It is an arithmetic number, because the mean of its divisors is an integer number (9976824).

Almost surely, 2^400242339 is an apocalyptic number.

400242339 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

400242339 is a deficient number, since it is larger than the sum of its proper divisors (318088989).

400242339 is a wasteful number, since it uses less digits than its factorization.

400242339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 400242339 is about 20006.0575576499. The cubic root of 400242339 is about 736.9550671069.

The spelling of 400242339 in words is "four hundred million, two hundred forty-two thousand, three hundred thirty-nine".