400306496 has 14 divisors (see below), whose sum is σ = 794358330. Its totient is φ = 200153216.

The previous prime is 400306483. The next prime is 400306499. The reversal of 400306496 is 694603004.

It can be written as a sum of positive squares in only one way, i.e., 316840000 + 83466496 = 17800^2 + 9136^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400306499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3127331 + ... + 3127458.

Almost surely, 2^400306496 is an apocalyptic number.

It is an amenable number.

400306496 is a deficient number, since it is larger than the sum of its proper divisors (394051834).

400306496 is an equidigital number, since it uses as much as digits as its factorization.

400306496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6254801 (or 6254791 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 400306496 is about 20007.6609327527. The cubic root of 400306496 is about 736.9944418353.

The spelling of 400306496 in words is "four hundred million, three hundred six thousand, four hundred ninety-six".