40247220 has 48 divisors (see below), whose sum is σ = 121363200. Its totient is φ = 9906816.

The previous prime is 40247219. The next prime is 40247237. The reversal of 40247220 is 2274204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25020 + ... + 26579.

It is an arithmetic number, because the mean of its divisors is an integer number (2528400).

Almost surely, 2^40247220 is an apocalyptic number.

It is an amenable number.

40247220 is an abundant number, since it is smaller than the sum of its proper divisors (81115980).

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

40247220 is a wasteful number, since it uses less digits than its factorization.

40247220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51624 (or 51622 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 40247220 is about 6344.0696717486. The cubic root of 40247220 is about 342.6983098625.

The spelling of 40247220 in words is "forty million, two hundred forty-seven thousand, two hundred twenty".