83840012 has 12 divisors (see below), whose sum is σ = 147599760. Its totient is φ = 41668656.

The previous prime is 83839997. The next prime is 83840017. The reversal of 83840012 is 21004838.

It is a super-2 number, since 2×83840012² = 14058295224320288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (83840017) 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, 62087 + ... + 63422.

It is an arithmetic number, because the mean of its divisors is an integer number (12299980).

Almost surely, 2^83840012 is an apocalyptic number.

It is an amenable number.

83840012 is a deficient number, since it is larger than the sum of its proper divisors (63759748).

83840012 is a wasteful number, since it uses less digits than its factorization.

83840012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125680 (or 125678 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 83840012 is about 9156.4191690857. The cubic root of 83840012 is about 437.6736934268.

The spelling of 83840012 in words is "eighty-three million, eight hundred forty thousand, twelve".