78653140 has 12 divisors (see below), whose sum is σ = 165171636. Its totient is φ = 31461248.

The previous prime is 78653119. The next prime is 78653147. The reversal of 78653140 is 4135687.

It can be written as a sum of positive squares in 2 ways, for example, as 54819216 + 23833924 = 7404^2 + 4882^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78653096 and 78653105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78653147) 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 3 ways as a sum of consecutive naturals, for example, 1966309 + ... + 1966348.

It is an arithmetic number, because the mean of its divisors is an integer number (13764303).

Almost surely, 2^78653140 is an apocalyptic number.

It is an amenable number.

78653140 is an abundant number, since it is smaller than the sum of its proper divisors (86518496).

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

78653140 is a wasteful number, since it uses less digits than its factorization.

78653140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3932666 (or 3932664 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 78653140 is about 8868.6605527554. The cubic root of 78653140 is about 428.4551378659.

The spelling of 78653140 in words is "seventy-eight million, six hundred fifty-three thousand, one hundred forty".