40729761 has 12 divisors (see below), whose sum is σ = 59797140. Its totient is φ = 26707680.

The previous prime is 40729727. The next prime is 40729763. The reversal of 40729761 is 16792704.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6155361 + 34574400 = 2481^2 + 5880^2 .

It is not a de Polignac number, because 40729761 - 2¹⁴ = 40713377 is a prime.

It is a super-2 number, since 2×40729761² = 3317826862234242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40729763) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36546 + ... + 37643.

It is an arithmetic number, because the mean of its divisors is an integer number (4983095).

Almost surely, 2^40729761 is an apocalyptic number.

It is an amenable number.

40729761 is a deficient number, since it is larger than the sum of its proper divisors (19067379).

40729761 is a wasteful number, since it uses less digits than its factorization.

40729761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74256 (or 74253 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 40729761 is about 6381.9872296958. The cubic root of 40729761 is about 344.0624576741.

The spelling of 40729761 in words is "forty million, seven hundred twenty-nine thousand, seven hundred sixty-one".