400306473 has 24 divisors (see below), whose sum is σ = 674888448. Its totient is φ = 223877952.

The previous prime is 400306453. The next prime is 400306483. The reversal of 400306473 is 374603004.

It is not a de Polignac number, because 400306473 - 2⁶ = 400306409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400306433) 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, 64636 + ... + 70557.

It is an arithmetic number, because the mean of its divisors is an integer number (28120352).

Almost surely, 2^400306473 is an apocalyptic number.

It is an amenable number.

400306473 is a deficient number, since it is larger than the sum of its proper divisors (274581975).

400306473 is a wasteful number, since it uses less digits than its factorization.

400306473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135253 (or 135250 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 27.

The square root of 400306473 is about 20007.6603579729. The cubic root of 400306473 is about 736.9944277204.

Adding to 400306473 its reverse (374603004), we get a palindrome (774909477).

The spelling of 400306473 in words is "four hundred million, three hundred six thousand, four hundred seventy-three".