400840695 has 24 divisors (see below), whose sum is σ = 717205632. Its totient is φ = 206884800.

The previous prime is 400840691. The next prime is 400840729. The reversal of 400840695 is 596048004.

It is not a de Polignac number, because 400840695 - 2² = 400840691 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400840691) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142276 + ... + 145065.

It is an arithmetic number, because the mean of its divisors is an integer number (29883568).

Almost surely, 2^400840695 is an apocalyptic number.

400840695 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

400840695 is a deficient number, since it is larger than the sum of its proper divisors (316364937).

400840695 is a wasteful number, since it uses less digits than its factorization.

400840695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287383 (or 287380 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 400840695 is about 20021.0063433385. The cubic root of 400840695 is about 737.3221296604.

Adding to 400840695 its reverse (596048004), we get a palindrome (996888699).

The spelling of 400840695 in words is "four hundred million, eight hundred forty thousand, six hundred ninety-five".