40797813 has 8 divisors (see below), whose sum is σ = 62168128. Its totient is φ = 23313024.

The previous prime is 40797811. The next prime is 40797821. The reversal of 40797813 is 31879704.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40797813 - 2¹ = 40797811 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 (40797811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 971356 + ... + 971397.

It is an arithmetic number, because the mean of its divisors is an integer number (7771016).

Almost surely, 2^40797813 is an apocalyptic number.

It is an amenable number.

40797813 is a deficient number, since it is larger than the sum of its proper divisors (21370315).

40797813 is a wasteful number, since it uses less digits than its factorization.

40797813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1942763.

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

The square root of 40797813 is about 6387.3165727088. The cubic root of 40797813 is about 344.2539729170.

The spelling of 40797813 in words is "forty million, seven hundred ninety-seven thousand, eight hundred thirteen".