78293860 has 24 divisors (see below), whose sum is σ = 164598840. Its totient is φ = 31282944.

The previous prime is 78293843. The next prime is 78293861. The reversal of 78293860 is 6839287.

It can be written as a sum of positive squares in 4 ways, for example, as 31069476 + 47224384 = 5574^2 + 6872^2 .

It is a super-2 number, since 2×78293860² = 12259857027399200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78293861) 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, 24262 + ... + 27298.

It is an arithmetic number, because the mean of its divisors is an integer number (6858285).

Almost surely, 2^78293860 is an apocalyptic number.

It is an amenable number.

78293860 is an abundant number, since it is smaller than the sum of its proper divisors (86304980).

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

78293860 is a wasteful number, since it uses less digits than its factorization.

78293860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4335 (or 4333 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 78293860 is about 8848.3817729571. The cubic root of 78293860 is about 427.8017613409.

The spelling of 78293860 in words is "seventy-eight million, two hundred ninety-three thousand, eight hundred sixty".