40694642 has 4 divisors (see below), whose sum is σ = 61041966. Its totient is φ = 20347320.

The previous prime is 40694623. The next prime is 40694663. The reversal of 40694642 is 24649604.

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

It can be written as a sum of positive squares in only one way, i.e., 40056241 + 638401 = 6329^2 + 799^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10173659 + ... + 10173662.

Almost surely, 2^40694642 is an apocalyptic number.

40694642 is a deficient number, since it is larger than the sum of its proper divisors (20347324).

40694642 is a wasteful number, since it uses less digits than its factorization.

40694642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20347323.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 40694642 is about 6379.2352206201. The cubic root of 40694642 is about 343.9635406194.

The spelling of 40694642 in words is "forty million, six hundred ninety-four thousand, six hundred forty-two".