40732813 has 4 divisors (see below), whose sum is σ = 44435808. Its totient is φ = 37029820.

The previous prime is 40732807. The next prime is 40732817. The reversal of 40732813 is 31823704.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40732813 - 2¹⁷ = 40601741 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 (40732817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1851481 + ... + 1851502.

It is an arithmetic number, because the mean of its divisors is an integer number (11108952).

Almost surely, 2^40732813 is an apocalyptic number.

It is an amenable number.

40732813 is a deficient number, since it is larger than the sum of its proper divisors (3702995).

40732813 is a wasteful number, since it uses less digits than its factorization.

40732813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3702994.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 40732813 is about 6382.2263356920. The cubic root of 40732813 is about 344.0710513279.

It can be divided in two parts, 4073 and 2813, that added together give a palindrome (6886).

The spelling of 40732813 in words is "forty million, seven hundred thirty-two thousand, eight hundred thirteen".