78100802 has 16 divisors (see below), whose sum is σ = 127894200. Its totient is φ = 35551872.

The previous prime is 78100787. The next prime is 78100807. The reversal of 78100802 is 20800187.

It can be written as a sum of positive squares in 4 ways, for example, as 39300361 + 38800441 = 6269^2 + 6229^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (78100807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18677 + ... + 22472.

Almost surely, 2^78100802 is an apocalyptic number.

78100802 is a deficient number, since it is larger than the sum of its proper divisors (49793398).

78100802 is a wasteful number, since it uses less digits than its factorization.

78100802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41237.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 78100802 is about 8837.4658132295. The cubic root of 78100802 is about 427.4498455804.

Adding to 78100802 its reverse (20800187), we get a palindrome (98900989).

The spelling of 78100802 in words is "seventy-eight million, one hundred thousand, eight hundred two".