40636247 has 8 divisors (see below), whose sum is σ = 42468096. Its totient is φ = 38844792.

The previous prime is 40636229. The next prime is 40636259. The reversal of 40636247 is 74263604.

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

It is a cyclic number.

It is not a de Polignac number, because 40636247 - 2²⁰ = 39587671 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 (40636747) 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, 8033 + ... + 12074.

It is an arithmetic number, because the mean of its divisors is an integer number (5308512).

Almost surely, 2^40636247 is an apocalyptic number.

40636247 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

40636247 is a deficient number, since it is larger than the sum of its proper divisors (1831849).

40636247 is a wasteful number, since it uses less digits than its factorization.

40636247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20197.

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 40636247 is about 6374.6566182031. The cubic root of 40636247 is about 343.7989377379.

The spelling of 40636247 in words is "forty million, six hundred thirty-six thousand, two hundred forty-seven".