407278255 has 4 divisors (see below), whose sum is σ = 488733912. Its totient is φ = 325822600.

The previous prime is 407278213. The next prime is 407278271. The reversal of 407278255 is 552872704.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 407278255 - 2⁷ = 407278127 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40727821 + ... + 40727830.

It is an arithmetic number, because the mean of its divisors is an integer number (122183478).

Almost surely, 2^407278255 is an apocalyptic number.

407278255 is a deficient number, since it is larger than the sum of its proper divisors (81455657).

407278255 is an equidigital number, since it uses as much as digits as its factorization.

407278255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81455656.

The product of its (nonzero) digits is 156800, while the sum is 40.

The square root of 407278255 is about 20181.1361176719. The cubic root of 407278255 is about 741.2483524728.

The spelling of 407278255 in words is "four hundred seven million, two hundred seventy-eight thousand, two hundred fifty-five".