83644628 has 6 divisors (see below), whose sum is σ = 146378106. Its totient is φ = 41822312.

The previous prime is 83644621. The next prime is 83644637. The reversal of 83644628 is 82644638.

It can be written as a sum of positive squares in only one way, i.e., 42016324 + 41628304 = 6482^2 + 6452^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83644621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10455575 + ... + 10455582.

It is an arithmetic number, because the mean of its divisors is an integer number (24396351).

Almost surely, 2^83644628 is an apocalyptic number.

It is an amenable number.

83644628 is a deficient number, since it is larger than the sum of its proper divisors (62733478).

83644628 is a wasteful number, since it uses less digits than its factorization.

83644628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20911161 (or 20911159 counting only the distinct ones).

The product of its digits is 221184, while the sum is 41.

The square root of 83644628 is about 9145.7437095077. The cubic root of 83644628 is about 437.3334384192. Note that the first 3 decimals are identical.

The spelling of 83644628 in words is "eighty-three million, six hundred forty-four thousand, six hundred twenty-eight".