83670138 has 16 divisors (see below), whose sum is σ = 185933760. Its totient is φ = 27890028.

The previous prime is 83670137. The next prime is 83670143. The reversal of 83670138 is 83107638.

It is not an unprimeable number, because it can be changed into a prime (83670137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 774670 + ... + 774777.

It is an arithmetic number, because the mean of its divisors is an integer number (11620860).

Almost surely, 2^83670138 is an apocalyptic number.

83670138 is an abundant number, since it is smaller than the sum of its proper divisors (102263622).

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

83670138 is a wasteful number, since it uses less digits than its factorization.

83670138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1549458 (or 1549452 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 83670138 is about 9147.1382410019. The cubic root of 83670138 is about 437.3778933244.

Subtracting from 83670138 its reverse (83107638), we obtain a square (562500 = 750²).

The spelling of 83670138 in words is "eighty-three million, six hundred seventy thousand, one hundred thirty-eight".