400494026 has 4 divisors (see below), whose sum is σ = 600741042. Its totient is φ = 200247012.

The previous prime is 400494019. The next prime is 400494047. The reversal of 400494026 is 620494004.

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., 380289001 + 20205025 = 19501^2 + 4495^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 400494026.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100123505 + ... + 100123508.

Almost surely, 2^400494026 is an apocalyptic number.

400494026 is a deficient number, since it is larger than the sum of its proper divisors (200247016).

400494026 is a wasteful number, since it uses less digits than its factorization.

400494026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200247015.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 400494026 is about 20012.3468388892. The cubic root of 400494026 is about 737.1095094919.

The spelling of 400494026 in words is "four hundred million, four hundred ninety-four thousand, twenty-six".