82987890 has 16 divisors (see below), whose sum is σ = 199171008. Its totient is φ = 22130096.

The previous prime is 82987871. The next prime is 82987903. The reversal of 82987890 is 9878928.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1383102 + ... + 1383161.

It is an arithmetic number, because the mean of its divisors is an integer number (12448188).

Almost surely, 2^82987890 is an apocalyptic number.

82987890 is an abundant number, since it is smaller than the sum of its proper divisors (116183118).

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

82987890 is a wasteful number, since it uses less digits than its factorization.

82987890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2766273.

The product of its (nonzero) digits is 580608, while the sum is 51.

The square root of 82987890 is about 9109.7689323056. The cubic root of 82987890 is about 436.1858513844.

The spelling of 82987890 in words is "eighty-two million, nine hundred eighty-seven thousand, eight hundred ninety".