40047656 has 32 divisors (see below), whose sum is σ = 82162080. Its totient is φ = 18148800.

The previous prime is 40047641. The next prime is 40047661. The reversal of 40047656 is 65674004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49850 + ... + 50646.

It is an arithmetic number, because the mean of its divisors is an integer number (2567565).

Almost surely, 2^40047656 is an apocalyptic number.

It is an amenable number.

40047656 is an abundant number, since it is smaller than the sum of its proper divisors (42114424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40047656 is a wasteful number, since it uses less digits than its factorization.

40047656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385 (or 1381 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 40047656 is about 6328.3217364480. The cubic root of 40047656 is about 342.1309531228.

The spelling of 40047656 in words is "forty million, forty-seven thousand, six hundred fifty-six".