78781010 has 64 divisors (see below), whose sum is σ = 178723584. Its totient is φ = 24288000.

The previous prime is 78780991. The next prime is 78781019. The reversal of 78781010 is 1018787.

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

It is not an unprimeable number, because it can be changed into a prime (78781019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77264 + ... + 78276.

It is an arithmetic number, because the mean of its divisors is an integer number (2792556).

Almost surely, 2^78781010 is an apocalyptic number.

78781010 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78781010 is an abundant number, since it is smaller than the sum of its proper divisors (99942574).

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

78781010 is a wasteful number, since it uses less digits than its factorization.

78781010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139.

The product of its (nonzero) digits is 3136, while the sum is 32.

The square root of 78781010 is about 8875.8667182422. The cubic root of 78781010 is about 428.6871985126.

Adding to 78781010 its reverse (1018787), we get a palindrome (79799797).

It can be divided in two parts, 7878 and 1010, that added together give a palindrome (8888).

The spelling of 78781010 in words is "seventy-eight million, seven hundred eighty-one thousand, ten".