400000017 has 8 divisors (see below), whose sum is σ = 533543296. Its totient is φ = 266561712.

The previous prime is 400000009. The next prime is 400000043. The reversal of 400000017 is 710000004.

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

It is not a de Polignac number, because 400000017 - 2³ = 400000009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 399999948 and 400000011.

It is not an unprimeable number, because it can be changed into a prime (400000067) 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, 16873 + ... + 32934.

It is an arithmetic number, because the mean of its divisors is an integer number (66692912).

Almost surely, 2^400000017 is an apocalyptic number.

It is an amenable number.

400000017 is a deficient number, since it is larger than the sum of its proper divisors (133543279).

400000017 is a wasteful number, since it uses less digits than its factorization.

400000017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52487.

The product of its (nonzero) digits is 28, while the sum is 12.

The square root of 400000017 is about 20000.0004250000. Note that the first 3 decimals coincide. The cubic root of 400000017 is about 736.8063101662.

The spelling of 400000017 in words is "four hundred million, seventeen", and thus it is an aban number.