40769813 has 12 divisors (see below), whose sum is σ = 47546892. Its totient is φ = 34856640.

The previous prime is 40769809. The next prime is 40769837. The reversal of 40769813 is 31896704.

It can be written as a sum of positive squares in 2 ways, for example, as 9878449 + 30891364 = 3143^2 + 5558^2 .

It is not a de Polignac number, because 40769813 - 2² = 40769809 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40769803) 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, 24731 + ... + 26327.

It is an arithmetic number, because the mean of its divisors is an integer number (3962241).

Almost surely, 2^40769813 is an apocalyptic number.

It is an amenable number.

40769813 is a deficient number, since it is larger than the sum of its proper divisors (6777079).

40769813 is a wasteful number, since it uses less digits than its factorization.

40769813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2132 (or 2125 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 40769813 is about 6385.1243527436. The cubic root of 40769813 is about 344.1751997629.

The spelling of 40769813 in words is "forty million, seven hundred sixty-nine thousand, eight hundred thirteen".