400242426 has 32 divisors (see below), whose sum is σ = 827629056. Its totient is φ = 128904000.

The previous prime is 400242331. The next prime is 400242439. The reversal of 400242426 is 624242004.

It is a junction number, because it is equal to n+sod(n) for n = 400242396 and 400242405.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151396 + ... + 154016.

It is an arithmetic number, because the mean of its divisors is an integer number (25863408).

Almost surely, 2^400242426 is an apocalyptic number.

400242426 is an abundant number, since it is smaller than the sum of its proper divisors (427386630).

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

400242426 is a wasteful number, since it uses less digits than its factorization.

400242426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3478.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 400242426 is about 20006.0597319912. The cubic root of 400242426 is about 736.9551205038.

The spelling of 400242426 in words is "four hundred million, two hundred forty-two thousand, four hundred twenty-six".