40687906 has 8 divisors (see below), whose sum is σ = 69750720. Its totient is φ = 17437668.

The previous prime is 40687891. The next prime is 40687909. The reversal of 40687906 is 60978604.

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 (40687909) 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, 1453126 + ... + 1453153.

It is an arithmetic number, because the mean of its divisors is an integer number (8718840).

Almost surely, 2^40687906 is an apocalyptic number.

40687906 is a deficient number, since it is larger than the sum of its proper divisors (29062814).

40687906 is a wasteful number, since it uses less digits than its factorization.

40687906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2906288.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 40687906 is about 6378.7072357963. The cubic root of 40687906 is about 343.9445613292.

The spelling of 40687906 in words is "forty million, six hundred eighty-seven thousand, nine hundred six".