400079945 has 8 divisors (see below), whose sum is σ = 481182336. Its totient is φ = 319339696.

The previous prime is 400079899. The next prime is 400079951. The reversal of 400079945 is 549970004.

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 400079945 - 2²⁴ = 383302729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400079899 and 400079908.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88097 + ... + 92526.

It is an arithmetic number, because the mean of its divisors is an integer number (60147792).

Almost surely, 2^400079945 is an apocalyptic number.

It is an amenable number.

400079945 is a deficient number, since it is larger than the sum of its proper divisors (81102391).

400079945 is a wasteful number, since it uses less digits than its factorization.

400079945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181071.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 400079945 is about 20001.9985251474. The cubic root of 400079945 is about 736.8553831079.

The spelling of 400079945 in words is "four hundred million, seventy-nine thousand, nine hundred forty-five".