83651980 has 12 divisors (see below), whose sum is σ = 175669200. Its totient is φ = 33460784.

The previous prime is 83651969. The next prime is 83651993. The reversal of 83651980 is 8915638.

It is a happy number.

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, 2091280 + ... + 2091319.

It is an arithmetic number, because the mean of its divisors is an integer number (14639100).

Almost surely, 2^83651980 is an apocalyptic number.

It is an amenable number.

83651980 is an abundant number, since it is smaller than the sum of its proper divisors (92017220).

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

83651980 is a wasteful number, since it uses less digits than its factorization.

83651980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4182608 (or 4182606 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 83651980 is about 9146.1456362776. The cubic root of 83651980 is about 437.3462512812.

The spelling of 83651980 in words is "eighty-three million, six hundred fifty-one thousand, nine hundred eighty".