40740681 has 16 divisors (see below), whose sum is σ = 55989504. Its totient is φ = 26337024.

The previous prime is 40740671. The next prime is 40740683. The reversal of 40740681 is 18604704.

It is not a de Polignac number, because 40740681 - 2¹⁵ = 40707913 is a prime.

It is a super-2 number, since 2×40740681² = 3319606176687522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40740683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14655 + ... + 17211.

It is an arithmetic number, because the mean of its divisors is an integer number (3499344).

Almost surely, 2^40740681 is an apocalyptic number.

It is an amenable number.

40740681 is a deficient number, since it is larger than the sum of its proper divisors (15248823).

40740681 is a wasteful number, since it uses less digits than its factorization.

40740681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2720.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 40740681 is about 6382.8427052529. The cubic root of 40740681 is about 344.0932036300.

The spelling of 40740681 in words is "forty million, seven hundred forty thousand, six hundred eighty-one".