40686280 has 16 divisors (see below), whose sum is σ = 91544220. Its totient is φ = 16274496.

The previous prime is 40686263. The next prime is 40686293. The reversal of 40686280 is 8268604.

It can be written as a sum of positive squares in 2 ways, for example, as 40678884 + 7396 = 6378^2 + 86^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508539 + ... + 508618.

Almost surely, 2^40686280 is an apocalyptic number.

40686280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40686280 is an abundant number, since it is smaller than the sum of its proper divisors (50857940).

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

40686280 is a wasteful number, since it uses less digits than its factorization.

40686280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017168 (or 1017164 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 40686280 is about 6378.5797792299. The cubic root of 40686280 is about 343.9399796131.

The spelling of 40686280 in words is "forty million, six hundred eighty-six thousand, two hundred eighty".