82921290 has 32 divisors (see below), whose sum is σ = 199345536. Its totient is φ = 22075200.

The previous prime is 82921259. The next prime is 82921337. The reversal of 82921290 is 9212928.

It is a happy number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 19059 + ... + 23001.

It is an arithmetic number, because the mean of its divisors is an integer number (6229548).

Almost surely, 2^82921290 is an apocalyptic number.

82921290 is an abundant number, since it is smaller than the sum of its proper divisors (116424246).

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

82921290 is a wasteful number, since it uses less digits than its factorization.

82921290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4654.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 82921290 is about 9106.1127820822. The cubic root of 82921290 is about 436.0691365549.

The spelling of 82921290 in words is "eighty-two million, nine hundred twenty-one thousand, two hundred ninety".