13640938 has 8 divisors (see below), whose sum is σ = 21014532. Its totient is φ = 6636096.

The previous prime is 13640911. The next prime is 13640947. The reversal of 13640938 is 83904631.

It can be written as a sum of positive squares in 2 ways, for example, as 13373649 + 267289 = 3657^2 + 517^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92095 + ... + 92242.

Almost surely, 2^13640938 is an apocalyptic number.

13640938 is a deficient number, since it is larger than the sum of its proper divisors (7373594).

13640938 is a wasteful number, since it uses less digits than its factorization.

13640938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184376.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 13640938 is about 3693.3640492104. The cubic root of 13640938 is about 238.9359024671.

The spelling of 13640938 in words is "thirteen million, six hundred forty thousand, nine hundred thirty-eight".