40193887 has 8 divisors (see below), whose sum is σ = 41564160. Its totient is φ = 38828280.

The previous prime is 40193869. The next prime is 40193897. The reversal of 40193887 is 78839104.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40193887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40193827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29814 + ... + 31132.

It is an arithmetic number, because the mean of its divisors is an integer number (5195520).

Almost surely, 2^40193887 is an apocalyptic number.

40193887 is a deficient number, since it is larger than the sum of its proper divisors (1370273).

40193887 is a wasteful number, since it uses less digits than its factorization.

40193887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2333.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 40193887 is about 6339.8649039234. The cubic root of 40193887 is about 342.5468691076.

The spelling of 40193887 in words is "forty million, one hundred ninety-three thousand, eight hundred eighty-seven".