40840780 has 12 divisors (see below), whose sum is σ = 85765680. Its totient is φ = 16336304.

The previous prime is 40840777. The next prime is 40840829. The reversal of 40840780 is 8704804.

It is a super-2 number, since 2×40840780² = 3335938622016800, which contains 22 as substring.

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, 1021000 + ... + 1021039.

It is an arithmetic number, because the mean of its divisors is an integer number (7147140).

Almost surely, 2^40840780 is an apocalyptic number.

It is an amenable number.

40840780 is an abundant number, since it is smaller than the sum of its proper divisors (44924900).

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

40840780 is a wasteful number, since it uses less digits than its factorization.

40840780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2042048 (or 2042046 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 40840780 is about 6390.6791501373. The cubic root of 40840780 is about 344.3747830759.

The spelling of 40840780 in words is "forty million, eight hundred forty thousand, seven hundred eighty".