400853831 has 16 divisors (see below), whose sum is σ = 465968640. Its totient is φ = 337724640.

The previous prime is 400853807. The next prime is 400853857. The reversal of 400853831 is 138358004.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 400853831 - 2¹⁰ = 400852807 is a prime.

It is a super-2 number, since 2×400853831² = 321367587654753122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400853861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 388286 + ... + 389316.

It is an arithmetic number, because the mean of its divisors is an integer number (29123040).

Almost surely, 2^400853831 is an apocalyptic number.

400853831 is a deficient number, since it is larger than the sum of its proper divisors (65114809).

400853831 is a wasteful number, since it uses less digits than its factorization.

400853831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1934.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 400853831 is about 20021.3343960886. The cubic root of 400853831 is about 737.3301838640.

The spelling of 400853831 in words is "four hundred million, eight hundred fifty-three thousand, eight hundred thirty-one".