400321242 has 48 divisors (see below), whose sum is σ = 880184448. Its totient is φ = 131482080.

The previous prime is 400321213. The next prime is 400321303. The reversal of 400321242 is 242123004.

400321242 is a `hidden beast` number, since 400 + 3 + 21 + 242 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 487192 + ... + 488012.

It is an arithmetic number, because the mean of its divisors is an integer number (18337176).

Almost surely, 2^400321242 is an apocalyptic number.

400321242 is an abundant number, since it is smaller than the sum of its proper divisors (479863206).

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

400321242 is a wasteful number, since it uses less digits than its factorization.

400321242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195 (or 1192 counting only the distinct ones).

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

The square root of 400321242 is about 20008.0294382031. The cubic root of 400321242 is about 737.0034912235.

Adding to 400321242 its reverse (242123004), we get a palindrome (642444246).

The spelling of 400321242 in words is "four hundred million, three hundred twenty-one thousand, two hundred forty-two".