400610431 has 4 divisors (see below), whose sum is σ = 431426632. Its totient is φ = 369794232.

The previous prime is 400610417. The next prime is 400610447. The reversal of 400610431 is 134016004.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 400610431 - 2²¹ = 398513279 is a prime.

It is a super-2 number, since 2×400610431² = 320977434852011522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400610399 and 400610408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400610731) 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, 15408081 + ... + 15408106.

It is an arithmetic number, because the mean of its divisors is an integer number (107856658).

Almost surely, 2^400610431 is an apocalyptic number.

400610431 is a deficient number, since it is larger than the sum of its proper divisors (30816201).

400610431 is a wasteful number, since it uses less digits than its factorization.

400610431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30816200.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 400610431 is about 20015.2549571571. The cubic root of 400610431 is about 737.1809170662.

Adding to 400610431 its reverse (134016004), we get a palindrome (534626435).

The spelling of 400610431 in words is "four hundred million, six hundred ten thousand, four hundred thirty-one".