40278473 has 4 divisors (see below), whose sum is σ = 40501188. Its totient is φ = 40055760.

The previous prime is 40278467. The next prime is 40278479. The reversal of 40278473 is 37487204.

40278473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (40278467) and next prime (40278479).

It can be written as a sum of positive squares in 2 ways, for example, as 12694969 + 27583504 = 3563^2 + 5252^2 .

It is a cyclic number.

It is not a de Polignac number, because 40278473 - 2⁶ = 40278409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40278479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111086 + ... + 111447.

It is an arithmetic number, because the mean of its divisors is an integer number (10125297).

Almost surely, 2^40278473 is an apocalyptic number.

It is an amenable number.

40278473 is a deficient number, since it is larger than the sum of its proper divisors (222715).

40278473 is a wasteful number, since it uses less digits than its factorization.

40278473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222714.

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 40278473 is about 6346.5323602736. The cubic root of 40278473 is about 342.7869915916.

The spelling of 40278473 in words is "forty million, two hundred seventy-eight thousand, four hundred seventy-three".