83540990 has 16 divisors (see below), whose sum is σ = 161941248. Its totient is φ = 30845856.

The previous prime is 83540987. The next prime is 83541011. The reversal of 83540990 is 9904538.

It is a congruent number.

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, 321182 + ... + 321441.

It is an arithmetic number, because the mean of its divisors is an integer number (10121328).

Almost surely, 2^83540990 is an apocalyptic number.

83540990 is a deficient number, since it is larger than the sum of its proper divisors (78400258).

83540990 is a wasteful number, since it uses less digits than its factorization.

83540990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642643.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 83540990 is about 9140.0760390710. The cubic root of 83540990 is about 437.1527410401.

The spelling of 83540990 in words is "eighty-three million, five hundred forty thousand, nine hundred ninety".