400880309 has 8 divisors (see below), whose sum is σ = 407484000. Its totient is φ = 394330032.

The previous prime is 400880299. The next prime is 400880323. The reversal of 400880309 is 903088004.

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

It is a cyclic number.

It is not a de Polignac number, because 400880309 - 2²⁸ = 132444853 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 (400880399) 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, 1922 + ... + 28380.

It is an arithmetic number, because the mean of its divisors is an integer number (50935500).

Almost surely, 2^400880309 is an apocalyptic number.

It is an amenable number.

400880309 is a deficient number, since it is larger than the sum of its proper divisors (6603691).

400880309 is a wasteful number, since it uses less digits than its factorization.

400880309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26707.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 400880309 is about 20021.9956298067. The cubic root of 400880309 is about 737.3464180432.

The spelling of 400880309 in words is "four hundred million, eight hundred eighty thousand, three hundred nine".