83020778 has 12 divisors (see below), whose sum is σ = 125213382. Its totient is φ = 41284080.

The previous prime is 83020771. The next prime is 83020799. The reversal of 83020778 is 87702038.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 40157569 + 42863209 = 6337^2 + 6547^2 .

It is not an unprimeable number, because it can be changed into a prime (83020771) 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, 153188 + ... + 153728.

Almost surely, 2^83020778 is an apocalyptic number.

83020778 is a deficient number, since it is larger than the sum of its proper divisors (42192604).

83020778 is an equidigital number, since it uses as much as digits as its factorization.

83020778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 83020778 is about 9111.5738486828. The cubic root of 83020778 is about 436.2434637488.

The spelling of 83020778 in words is "eighty-three million, twenty thousand, seven hundred seventy-eight".