40520288 has 12 divisors (see below), whose sum is σ = 79774380. Its totient is φ = 20260128.

The previous prime is 40520281. The next prime is 40520309. The reversal of 40520288 is 88202504.

It is a self number, because there is not a number n which added to its sum of digits gives 40520288.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40520281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633098 + ... + 633161.

It is an arithmetic number, because the mean of its divisors is an integer number (6647865).

Almost surely, 2^40520288 is an apocalyptic number.

It is an amenable number.

40520288 is a deficient number, since it is larger than the sum of its proper divisors (39254092).

40520288 is a wasteful number, since it uses less digits than its factorization.

40520288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266269 (or 1266261 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 40520288 is about 6365.5548069277. The cubic root of 40520288 is about 343.4716063110.

The spelling of 40520288 in words is "forty million, five hundred twenty thousand, two hundred eighty-eight".