82078780 has 24 divisors (see below), whose sum is σ = 196989408. Its totient is φ = 28141248.

The previous prime is 82078751. The next prime is 82078807. The reversal of 82078780 is 8787028.

It is a super-2 number, since 2×82078780² = 13473852252576800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292999 + ... + 293278.

It is an arithmetic number, because the mean of its divisors is an integer number (8207892).

Almost surely, 2^82078780 is an apocalyptic number.

It is an amenable number.

82078780 is an abundant number, since it is smaller than the sum of its proper divisors (114910628).

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

82078780 is a wasteful number, since it uses less digits than its factorization.

82078780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586293 (or 586291 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 40.

The square root of 82078780 is about 9059.7339916799. The cubic root of 82078780 is about 434.5872334158.

The spelling of 82078780 in words is "eighty-two million, seventy-eight thousand, seven hundred eighty".