40278279 has 4 divisors (see below), whose sum is σ = 53704376. Its totient is φ = 26852184.

The previous prime is 40278263. The next prime is 40278281. The reversal of 40278279 is 97287204.

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

It is not a de Polignac number, because 40278279 - 2⁴ = 40278263 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 (40278209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6713044 + ... + 6713049.

It is an arithmetic number, because the mean of its divisors is an integer number (13426094).

Almost surely, 2^40278279 is an apocalyptic number.

40278279 is a deficient number, since it is larger than the sum of its proper divisors (13426097).

40278279 is a wasteful number, since it uses less digits than its factorization.

40278279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13426096.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 40278279 is about 6346.5170763183. The cubic root of 40278279 is about 342.7864412498.

The spelling of 40278279 in words is "forty million, two hundred seventy-eight thousand, two hundred seventy-nine".