78503712 has 96 divisors (see below), whose sum is σ = 237105792. Its totient is φ = 22278144.

The previous prime is 78503693. The next prime is 78503717. The reversal of 78503712 is 21730587.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (78503717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132088 + ... + 132680.

It is an arithmetic number, because the mean of its divisors is an integer number (2469852).

Almost surely, 2^78503712 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 78503712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118552896).

78503712 is an abundant number, since it is smaller than the sum of its proper divisors (158602080).

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

78503712 is a wasteful number, since it uses less digits than its factorization.

78503712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810 (or 802 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 78503712 is about 8860.2320511373. The cubic root of 78503712 is about 428.1836344791.

The spelling of 78503712 in words is "seventy-eight million, five hundred three thousand, seven hundred twelve".