82243380 has 24 divisors (see below), whose sum is σ = 230281632. Its totient is φ = 21931552.

The previous prime is 82243327. The next prime is 82243409. The reversal of 82243380 is 8334228.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 685302 + ... + 685421.

It is an arithmetic number, because the mean of its divisors is an integer number (9595068).

Almost surely, 2^82243380 is an apocalyptic number.

It is an amenable number.

82243380 is an abundant number, since it is smaller than the sum of its proper divisors (148038252).

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

82243380 is a wasteful number, since it uses less digits than its factorization.

82243380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370735 (or 1370733 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 82243380 is about 9068.8135938501. The cubic root of 82243380 is about 434.8775451325.

The spelling of 82243380 in words is "eighty-two million, two hundred forty-three thousand, three hundred eighty".