400204402442 has 16 divisors (see below), whose sum is σ = 660239016192. Its totient is φ = 180779729520.

The previous prime is 400204402421. The next prime is 400204402471. The reversal of 400204402442 is 244204402004.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163748534 + ... + 163750977.

It is an arithmetic number, because the mean of its divisors is an integer number (41264938512).

Almost surely, 2^400204402442 is an apocalyptic number.

400204402442 is a deficient number, since it is larger than the sum of its proper divisors (260034613750).

400204402442 is a wasteful number, since it uses less digits than its factorization.

400204402442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327499573.

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 400204402442 its reverse (244204402004), we get a palindrome (644408804446).

The spelling of 400204402442 in words is "four hundred billion, two hundred four million, four hundred two thousand, four hundred forty-two".