82780300 has 18 divisors (see below), whose sum is σ = 179633468. Its totient is φ = 33112080.

The previous prime is 82780277. The next prime is 82780303. The reversal of 82780300 is 308728.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (82780303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 413802 + ... + 414001.

Almost surely, 2^82780300 is an apocalyptic number.

It is an amenable number.

82780300 is an abundant number, since it is smaller than the sum of its proper divisors (96853168).

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

82780300 is a wasteful number, since it uses less digits than its factorization.

82780300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827817 (or 827810 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 82780300 is about 9098.3679855236. The cubic root of 82780300 is about 435.8218487721.

The spelling of 82780300 in words is "eighty-two million, seven hundred eighty thousand, three hundred".