40987579 has 6 divisors (see below), whose sum is σ = 43258740. Its totient is φ = 38829996.

The previous prime is 40987559. The next prime is 40987589. The reversal of 40987579 is 97578904.

It is a happy number.

It is not a de Polignac number, because 40987579 - 2¹⁵ = 40954811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40987559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56409 + ... + 57130.

It is an arithmetic number, because the mean of its divisors is an integer number (7209790).

Almost surely, 2^40987579 is an apocalyptic number.

40987579 is a deficient number, since it is larger than the sum of its proper divisors (2271161).

40987579 is a wasteful number, since it uses less digits than its factorization.

40987579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113577 (or 113558 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 40987579 is about 6402.1542468141. The cubic root of 40987579 is about 344.7868991340.

The spelling of 40987579 in words is "forty million, nine hundred eighty-seven thousand, five hundred seventy-nine".