82770780 has 24 divisors (see below), whose sum is σ = 231758352. Its totient is φ = 22072192.

The previous prime is 82770733. The next prime is 82770781. The reversal of 82770780 is 8707728.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82770781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 689697 + ... + 689816.

It is an arithmetic number, because the mean of its divisors is an integer number (9656598).

Almost surely, 2^82770780 is an apocalyptic number.

It is an amenable number.

82770780 is an abundant number, since it is smaller than the sum of its proper divisors (148987572).

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

82770780 is a wasteful number, since it uses less digits than its factorization.

82770780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379525 (or 1379523 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 39.

The square root of 82770780 is about 9097.8447997314. The cubic root of 82770780 is about 435.8051411615.

The spelling of 82770780 in words is "eighty-two million, seven hundred seventy thousand, seven hundred eighty".