82757780 has 24 divisors (see below), whose sum is σ = 198619008. Its totient is φ = 28374048.

The previous prime is 82757777. The next prime is 82757783. The reversal of 82757780 is 8775728.

It is an interprime number because it is at equal distance from previous prime (82757777) and next prime (82757783).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82757783) by changing a digit.

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, 295424 + ... + 295703.

It is an arithmetic number, because the mean of its divisors is an integer number (8275792).

Almost surely, 2^82757780 is an apocalyptic number.

It is an amenable number.

82757780 is an abundant number, since it is smaller than the sum of its proper divisors (115861228).

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

82757780 is a wasteful number, since it uses less digits than its factorization.

82757780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591143 (or 591141 counting only the distinct ones).

The product of its (nonzero) digits is 219520, while the sum is 44.

The square root of 82757780 is about 9097.1303167537. The cubic root of 82757780 is about 435.7823240777.

The spelling of 82757780 in words is "eighty-two million, seven hundred fifty-seven thousand, seven hundred eighty".