400428242 has 8 divisors (see below), whose sum is σ = 600952716. Its totient is φ = 200110672.

The previous prime is 400428239. The next prime is 400428257. The reversal of 400428242 is 242824004.

It can be written as a sum of positive squares in 2 ways, for example, as 385690321 + 14737921 = 19639^2 + 3839^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46793 + ... + 54684.

Almost surely, 2^400428242 is an apocalyptic number.

400428242 is a deficient number, since it is larger than the sum of its proper divisors (200524474).

400428242 is a wasteful number, since it uses less digits than its factorization.

400428242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103452.

The product of its (nonzero) digits is 4096, while the sum is 26.

The square root of 400428242 is about 20010.7031860452. The cubic root of 400428242 is about 737.0691487841.

It can be divided in two parts, 40042 and 8242, that added together give a palindrome (48284).

The spelling of 400428242 in words is "four hundred million, four hundred twenty-eight thousand, two hundred forty-two".