82443990 has 16 divisors (see below), whose sum is σ = 197865648. Its totient is φ = 21985056.

The previous prime is 82443979. The next prime is 82444007. The reversal of 82443990 is 9934428.

It is a super-2 number, since 2×82443990² = 13594022974240200, which contains 22 as substring.

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, 1374037 + ... + 1374096.

It is an arithmetic number, because the mean of its divisors is an integer number (12366603).

Almost surely, 2^82443990 is an apocalyptic number.

82443990 is an abundant number, since it is smaller than the sum of its proper divisors (115421658).

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

82443990 is a wasteful number, since it uses less digits than its factorization.

82443990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2748143.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 82443990 is about 9079.8672897791. The cubic root of 82443990 is about 435.2308458968.

The spelling of 82443990 in words is "eighty-two million, four hundred forty-three thousand, nine hundred ninety".