40880781 has 20 divisors (see below), whose sum is σ = 61262784. Its totient is φ = 27167400.

The previous prime is 40880779. The next prime is 40880783. The reversal of 40880781 is 18708804.

It is an interprime number because it is at equal distance from previous prime (40880779) and next prime (40880783).

It is not a de Polignac number, because 40880781 - 2¹ = 40880779 is a prime.

It is a super-2 number, since 2×40880781² = 3342476510339922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40880783) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 34326 + ... + 35496.

Almost surely, 2^40880781 is an apocalyptic number.

It is an amenable number.

40880781 is a deficient number, since it is larger than the sum of its proper divisors (20382003).

40880781 is a wasteful number, since it uses less digits than its factorization.

40880781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614 (or 1605 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 40880781 is about 6393.8080202646. The cubic root of 40880781 is about 344.4871776056.

The spelling of 40880781 in words is "forty million, eight hundred eighty thousand, seven hundred eighty-one".