40938813 has 12 divisors (see below), whose sum is σ = 59967648. Its totient is φ = 26907720.

The previous prime is 40938797. The next prime is 40938829. The reversal of 40938813 is 31883904.

It is an interprime number because it is at equal distance from previous prime (40938797) and next prime (40938829).

It is not a de Polignac number, because 40938813 - 2⁴ = 40938797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40938013) 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, 31395 + ... + 32672.

It is an arithmetic number, because the mean of its divisors is an integer number (4997304).

Almost surely, 2^40938813 is an apocalyptic number.

It is an amenable number.

40938813 is a deficient number, since it is larger than the sum of its proper divisors (19028835).

40938813 is a wasteful number, since it uses less digits than its factorization.

40938813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64144 (or 64141 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 40938813 is about 6398.3445515227. The cubic root of 40938813 is about 344.6501052484.

The spelling of 40938813 in words is "forty million, nine hundred thirty-eight thousand, eight hundred thirteen".