40647894 has 32 divisors (see below), whose sum is σ = 93440256. Its totient is φ = 11547360.

The previous prime is 40647889. The next prime is 40647961. The reversal of 40647894 is 49874604.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent 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, 4929 + ... + 10275.

It is an arithmetic number, because the mean of its divisors is an integer number (2920008).

Almost surely, 2^40647894 is an apocalyptic number.

40647894 is an abundant number, since it is smaller than the sum of its proper divisors (52792362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40647894 is a wasteful number, since it uses less digits than its factorization.

40647894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5540.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 40647894 is about 6375.5700921565. The cubic root of 40647894 is about 343.8317806965.

The spelling of 40647894 in words is "forty million, six hundred forty-seven thousand, eight hundred ninety-four".