400652831 has 4 divisors (see below), whose sum is σ = 406632792. Its totient is φ = 394672872.

The previous prime is 400652827. The next prime is 400652851. The reversal of 400652831 is 138256004.

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 400652831 - 2² = 400652827 is a prime.

It is a super-2 number, since 2×400652831² = 321045381976629122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400652794 and 400652803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400652851) 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, 2989880 + ... + 2990013.

It is an arithmetic number, because the mean of its divisors is an integer number (101658198).

Almost surely, 2^400652831 is an apocalyptic number.

400652831 is a deficient number, since it is larger than the sum of its proper divisors (5979961).

400652831 is an equidigital number, since it uses as much as digits as its factorization.

400652831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5979960.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 400652831 is about 20016.3141212362. The cubic root of 400652831 is about 737.2069235186.

The spelling of 400652831 in words is "four hundred million, six hundred fifty-two thousand, eight hundred thirty-one".