400960646 has 4 divisors (see below), whose sum is σ = 601440972. Its totient is φ = 200480322.

The previous prime is 400960627. The next prime is 400960649. The reversal of 400960646 is 646069004.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400960649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100240160 + ... + 100240163.

It is an arithmetic number, because the mean of its divisors is an integer number (150360243).

Almost surely, 2^400960646 is an apocalyptic number.

400960646 is a deficient number, since it is larger than the sum of its proper divisors (200480326).

400960646 is a wasteful number, since it uses less digits than its factorization.

400960646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200480325.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 400960646 is about 20024.0017479024. The cubic root of 400960646 is about 737.3956698534.

The spelling of 400960646 in words is "four hundred million, nine hundred sixty thousand, six hundred forty-six".