40678645 has 32 divisors (see below), whose sum is σ = 57784320. Its totient is φ = 26913600.

The previous prime is 40678633. The next prime is 40678667. The reversal of 40678645 is 54687604.

It is not a de Polignac number, because 40678645 - 2¹⁵ = 40645877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40678598 and 40678607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 227166 + ... + 227344.

It is an arithmetic number, because the mean of its divisors is an integer number (1805760).

Almost surely, 2^40678645 is an apocalyptic number.

It is an amenable number.

40678645 is a deficient number, since it is larger than the sum of its proper divisors (17105675).

40678645 is a wasteful number, since it uses less digits than its factorization.

40678645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385.

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 40678645 is about 6377.9812636915. The cubic root of 40678645 is about 343.9184642028.

The spelling of 40678645 in words is "forty million, six hundred seventy-eight thousand, six hundred forty-five".