82770280 has 32 divisors (see below), whose sum is σ = 197189640. Its totient is φ = 31160320.

The previous prime is 82770277. The next prime is 82770287. The reversal of 82770280 is 8207728.

It can be written as a sum of positive squares in 4 ways, for example, as 73925604 + 8844676 = 8598^2 + 2974^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (82770287) 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, 60181 + ... + 61540.

Almost surely, 2^82770280 is an apocalyptic number.

It is an amenable number.

82770280 is an abundant number, since it is smaller than the sum of its proper divisors (114419360).

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

82770280 is a wasteful number, since it uses less digits than its factorization.

82770280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121749 (or 121745 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 82770280 is about 9097.8173206544. The cubic root of 82770280 is about 435.8042636255.

The spelling of 82770280 in words is "eighty-two million, seven hundred seventy thousand, two hundred eighty".