82989890 has 32 divisors (see below), whose sum is σ = 155976624. Its totient is φ = 31760640.

The previous prime is 82989859. The next prime is 82989899. The reversal of 82989890 is 9898928.

It can be written as a sum of positive squares in 8 ways, for example, as 42680089 + 40309801 = 6533^2 + 6349^2 .

It is not an unprimeable number, because it can be changed into a prime (82989899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20732 + ... + 24408.

Almost surely, 2^82989890 is an apocalyptic number.

82989890 is a deficient number, since it is larger than the sum of its proper divisors (72986734).

82989890 is a wasteful number, since it uses less digits than its factorization.

82989890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3782.

The product of its (nonzero) digits is 746496, while the sum is 53.

The square root of 82989890 is about 9109.8787039126. The cubic root of 82989890 is about 436.1893553683.

The spelling of 82989890 in words is "eighty-two million, nine hundred eighty-nine thousand, eight hundred ninety".