400606442 has 4 divisors (see below), whose sum is σ = 600909666. Its totient is φ = 200303220.

The previous prime is 400606439. The next prime is 400606463. The reversal of 400606442 is 244606004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 310147321 + 90459121 = 17611^2 + 9511^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100151609 + ... + 100151612.

Almost surely, 2^400606442 is an apocalyptic number.

400606442 is a deficient number, since it is larger than the sum of its proper divisors (200303224).

400606442 is a wasteful number, since it uses less digits than its factorization.

400606442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200303223.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 400606442 is about 20015.1553079160. The cubic root of 400606442 is about 737.1784702799.

The spelling of 400606442 in words is "four hundred million, six hundred six thousand, four hundred forty-two".