78901012 has 12 divisors (see below), whose sum is σ = 146199060. Its totient is φ = 37129856.

The previous prime is 78900989. The next prime is 78901019. The reversal of 78901012 is 21010987.

It can be written as a sum of positive squares in 2 ways, for example, as 22410756 + 56490256 = 4734^2 + 7516^2 .

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78901019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 580087 + ... + 580222.

It is an arithmetic number, because the mean of its divisors is an integer number (12183255).

Almost surely, 2^78901012 is an apocalyptic number.

It is an amenable number.

78901012 is a deficient number, since it is larger than the sum of its proper divisors (67298048).

78901012 is a wasteful number, since it uses less digits than its factorization.

78901012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160330 (or 1160328 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 78901012 is about 8882.6241618116. The cubic root of 78901012 is about 428.9047518849.

Adding to 78901012 its reverse (21010987), we get a palindrome (99911999).

The spelling of 78901012 in words is "seventy-eight million, nine hundred one thousand, twelve".