400632653 has 8 divisors (see below), whose sum is σ = 426947328. Its totient is φ = 375059344.

The previous prime is 400632641. The next prime is 400632691. The reversal of 400632653 is 356236004.

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

It is not a de Polignac number, because 400632653 - 2⁴ = 400632637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400632053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184226 + ... + 186387.

It is an arithmetic number, because the mean of its divisors is an integer number (53368416).

Almost surely, 2^400632653 is an apocalyptic number.

It is an amenable number.

400632653 is a deficient number, since it is larger than the sum of its proper divisors (26314675).

400632653 is a wasteful number, since it uses less digits than its factorization.

400632653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370683.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 400632653 is about 20015.8100760374. The cubic root of 400632653 is about 737.1945473749.

Adding to 400632653 its reverse (356236004), we get a palindrome (756868657).

The spelling of 400632653 in words is "four hundred million, six hundred thirty-two thousand, six hundred fifty-three".