83780812 has 12 divisors (see below), whose sum is σ = 152991216. Its totient is φ = 40069040.

The previous prime is 83780761. The next prime is 83780821. The reversal of 83780812 is 21808738.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455239 + ... + 455422.

It is an arithmetic number, because the mean of its divisors is an integer number (12749268).

Almost surely, 2^83780812 is an apocalyptic number.

It is an amenable number.

83780812 is a deficient number, since it is larger than the sum of its proper divisors (69210404).

83780812 is a wasteful number, since it uses less digits than its factorization.

83780812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910688 (or 910686 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 83780812 is about 9153.1858934472. The cubic root of 83780812 is about 437.5706543849.

The spelling of 83780812 in words is "eighty-three million, seven hundred eighty thousand, eight hundred twelve".