83840664 has 16 divisors (see below), whose sum is σ = 209601720. Its totient is φ = 27946880.

The previous prime is 83840663. The next prime is 83840693. The reversal of 83840664 is 46604838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83840663) 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, 1746657 + ... + 1746704.

Almost surely, 2^83840664 is an apocalyptic number.

It is an amenable number.

83840664 is an abundant number, since it is smaller than the sum of its proper divisors (125761056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83840664 is a wasteful number, since it uses less digits than its factorization.

83840664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3493370 (or 3493366 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 83840664 is about 9156.4547724542. The cubic root of 83840664 is about 437.6748279786.

The spelling of 83840664 in words is "eighty-three million, eight hundred forty thousand, six hundred sixty-four".