40973781 has 16 divisors (see below), whose sum is σ = 57087360. Its totient is φ = 26107200.

The previous prime is 40973753. The next prime is 40973843. The reversal of 40973781 is 18737904.

It is not a de Polignac number, because 40973781 - 2¹⁵ = 40941013 is a prime.

It is a super-2 number, since 2×40973781² = 3357701458871922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40973981) 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, 6456 + ... + 11118.

It is an arithmetic number, because the mean of its divisors is an integer number (3567960).

Almost surely, 2^40973781 is an apocalyptic number.

It is an amenable number.

40973781 is a deficient number, since it is larger than the sum of its proper divisors (16113579).

40973781 is a wasteful number, since it uses less digits than its factorization.

40973781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4796.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 40973781 is about 6401.0765500812. The cubic root of 40973781 is about 344.7482052688.

It can be divided in two parts, 40973 and 781, that multiplied together give a palindrome (31999913).

The spelling of 40973781 in words is "forty million, nine hundred seventy-three thousand, seven hundred eighty-one".