40509860 has 12 divisors (see below), whose sum is σ = 85070748. Its totient is φ = 16203936.

The previous prime is 40509841. The next prime is 40509899. The reversal of 40509860 is 6890504.

It can be written as a sum of positive squares in 2 ways, for example, as 17623204 + 22886656 = 4198^2 + 4784^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

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, 1012727 + ... + 1012766.

It is an arithmetic number, because the mean of its divisors is an integer number (7089229).

Almost surely, 2^40509860 is an apocalyptic number.

It is an amenable number.

40509860 is an abundant number, since it is smaller than the sum of its proper divisors (44560888).

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

40509860 is a wasteful number, since it uses less digits than its factorization.

40509860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025502 (or 2025500 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 40509860 is about 6364.7356582972. The cubic root of 40509860 is about 343.4421393502.

The spelling of 40509860 in words is "forty million, five hundred nine thousand, eight hundred sixty".