40538413 has 4 divisors (see below), whose sum is σ = 40750848. Its totient is φ = 40325980.

The previous prime is 40538401. The next prime is 40538423. The reversal of 40538413 is 31483504.

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 a de Polignac number, because none of the positive numbers 2^k-40538413 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 (40538423) 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, 105931 + ... + 106312.

It is an arithmetic number, because the mean of its divisors is an integer number (10187712).

Almost surely, 2^40538413 is an apocalyptic number.

It is an amenable number.

40538413 is a deficient number, since it is larger than the sum of its proper divisors (212435).

40538413 is a wasteful number, since it uses less digits than its factorization.

40538413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212434.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 40538413 is about 6366.9783257052. The cubic root of 40538413 is about 343.5228110710.

The spelling of 40538413 in words is "forty million, five hundred thirty-eight thousand, four hundred thirteen".