40678905 has 16 divisors (see below), whose sum is σ = 68512320. Its totient is φ = 20553408.

The previous prime is 40678889. The next prime is 40678919. The reversal of 40678905 is 50987604.

It is not a de Polignac number, because 40678905 - 2⁴ = 40678889 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71082 + ... + 71651.

It is an arithmetic number, because the mean of its divisors is an integer number (4282020).

Almost surely, 2^40678905 is an apocalyptic number.

It is an amenable number.

40678905 is a deficient number, since it is larger than the sum of its proper divisors (27833415).

40678905 is a wasteful number, since it uses less digits than its factorization.

40678905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142760.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 40678905 is about 6378.0016462839. The cubic root of 40678905 is about 343.9191969264.

The spelling of 40678905 in words is "forty million, six hundred seventy-eight thousand, nine hundred five".