40687858 has 8 divisors (see below), whose sum is σ = 61294428. Its totient is φ = 20256384.

The previous prime is 40687771. The next prime is 40687859. The reversal of 40687858 is 85878604.

It can be written as a sum of positive squares in 2 ways, for example, as 33489369 + 7198489 = 5787^2 + 2683^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (40687859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43191 + ... + 44122.

Almost surely, 2^40687858 is an apocalyptic number.

40687858 is a deficient number, since it is larger than the sum of its proper divisors (20606570).

40687858 is a wasteful number, since it uses less digits than its factorization.

40687858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87548.

The product of its (nonzero) digits is 430080, while the sum is 46.

The square root of 40687858 is about 6378.7034732773. The cubic root of 40687858 is about 343.9444260774.

The spelling of 40687858 in words is "forty million, six hundred eighty-seven thousand, eight hundred fifty-eight".