40807987 has 4 divisors (see below), whose sum is σ = 44517816. Its totient is φ = 37098160.

The previous prime is 40807979. The next prime is 40808063. The reversal of 40807987 is 78970804.

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

It is not a de Polignac number, because 40807987 - 2³ = 40807979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40807927) 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, 1854898 + ... + 1854919.

It is an arithmetic number, because the mean of its divisors is an integer number (11129454).

Almost surely, 2^40807987 is an apocalyptic number.

40807987 is a deficient number, since it is larger than the sum of its proper divisors (3709829).

40807987 is a wasteful number, since it uses less digits than its factorization.

40807987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3709828.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 40807987 is about 6388.1129451505. The cubic root of 40807987 is about 344.2825867777.

The spelling of 40807987 in words is "forty million, eight hundred seven thousand, nine hundred eighty-seven".