83644738 has 8 divisors (see below), whose sum is σ = 125528832. Its totient is φ = 41801796.

The previous prime is 83644723. The next prime is 83644793. The reversal of 83644738 is 83744638.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 83644694 and 83644703.

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, 4570 + ... + 13717.

It is an arithmetic number, because the mean of its divisors is an integer number (15691104).

Almost surely, 2^83644738 is an apocalyptic number.

83644738 is a deficient number, since it is larger than the sum of its proper divisors (41884094).

83644738 is a wasteful number, since it uses less digits than its factorization.

83644738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20576.

The product of its digits is 387072, while the sum is 43.

The square root of 83644738 is about 9145.7497232321. The cubic root of 83644738 is about 437.3336301296. Note that the first 3 decimals are identical.

The spelling of 83644738 in words is "eighty-three million, six hundred forty-four thousand, seven hundred thirty-eight".