78763740 has 144 divisors (see below), whose sum is σ = 255615360. Its totient is φ = 18057600.

The previous prime is 78763733. The next prime is 78763781. The reversal of 78763740 is 4736787.

It is a junction number, because it is equal to n+sod(n) for n = 78763692 and 78763701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 137655 + ... + 138225.

Almost surely, 2^78763740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78763740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127807680).

78763740 is an abundant number, since it is smaller than the sum of its proper divisors (176851620).

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

78763740 is a wasteful number, since it uses less digits than its factorization.

78763740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624 (or 611 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 42.

The square root of 78763740 is about 8874.8938021815. The cubic root of 78763740 is about 428.6558712974.

The spelling of 78763740 in words is "seventy-eight million, seven hundred sixty-three thousand, seven hundred forty".