400431194 has 8 divisors (see below), whose sum is σ = 632259840. Its totient is φ = 189677916.

The previous prime is 400431193. The next prime is 400431197. The reversal of 400431194 is 491134004.

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

It is a super-2 number, since 2×400431194² = 320690282256531272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400431191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5268794 + ... + 5268869.

It is an arithmetic number, because the mean of its divisors is an integer number (79032480).

Almost surely, 2^400431194 is an apocalyptic number.

400431194 is a deficient number, since it is larger than the sum of its proper divisors (231828646).

400431194 is a wasteful number, since it uses less digits than its factorization.

400431194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10537684.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 400431194 is about 20010.7769464356. The cubic root of 400431194 is about 737.0709600306.

Adding to 400431194 its reverse (491134004), we get a palindrome (891565198).

The spelling of 400431194 in words is "four hundred million, four hundred thirty-one thousand, one hundred ninety-four".