400078579 has 8 divisors (see below), whose sum is σ = 410872880. Its totient is φ = 389352096.

The previous prime is 400078543. The next prime is 400078619. The reversal of 400078579 is 975870004.

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 400078579 - 2¹⁹ = 399554291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400078979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4884 + ... + 28705.

It is an arithmetic number, because the mean of its divisors is an integer number (51359110).

Almost surely, 2^400078579 is an apocalyptic number.

400078579 is a deficient number, since it is larger than the sum of its proper divisors (10794301).

400078579 is a wasteful number, since it uses less digits than its factorization.

400078579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33909.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 400078579 is about 20001.9643785304. The cubic root of 400078579 is about 736.8545444875.

The spelling of 400078579 in words is "four hundred million, seventy-eight thousand, five hundred seventy-nine".