40247636 has 48 divisors (see below), whose sum is σ = 87635520. Its totient is φ = 15889920.

The previous prime is 40247633. The next prime is 40247639. The reversal of 40247636 is 63674204.

It is an interprime number because it is at equal distance from previous prime (40247633) and next prime (40247639).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40247633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7655 + ... + 11793.

It is an arithmetic number, because the mean of its divisors is an integer number (1825740).

Almost surely, 2^40247636 is an apocalyptic number.

It is an amenable number.

40247636 is an abundant number, since it is smaller than the sum of its proper divisors (47387884).

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

40247636 is a wasteful number, since it uses less digits than its factorization.

40247636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4184 (or 4182 counting only the distinct ones).

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

The square root of 40247636 is about 6344.1024581890. The cubic root of 40247636 is about 342.6994905817.

The spelling of 40247636 in words is "forty million, two hundred forty-seven thousand, six hundred thirty-six".