40636694 has 16 divisors (see below), whose sum is σ = 69748128. Its totient is φ = 17394432.

The previous prime is 40636657. The next prime is 40636709. The reversal of 40636694 is 49663604.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16742 + ... + 19014.

It is an arithmetic number, because the mean of its divisors is an integer number (4359258).

Almost surely, 2^40636694 is an apocalyptic number.

40636694 is a deficient number, since it is larger than the sum of its proper divisors (29111434).

40636694 is a wasteful number, since it uses less digits than its factorization.

40636694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3559.

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 40636694 is about 6374.6916788187. The cubic root of 40636694 is about 343.8001983330.

The spelling of 40636694 in words is "forty million, six hundred thirty-six thousand, six hundred ninety-four".