78519552 has 72 divisors (see below), whose sum is σ = 220016160. Its totient is φ = 24791040.

The previous prime is 78519523. The next prime is 78519557. The reversal of 78519552 is 25591587.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78519557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11902 + ... + 17282.

It is an arithmetic number, because the mean of its divisors is an integer number (3055780).

Almost surely, 2^78519552 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 78519552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110008080).

78519552 is an abundant number, since it is smaller than the sum of its proper divisors (141496608).

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

78519552 is a wasteful number, since it uses less digits than its factorization.

78519552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5419 (or 5405 counting only the distinct ones).

The product of its digits is 126000, while the sum is 42.

The square root of 78519552 is about 8861.1258878316. The cubic root of 78519552 is about 428.2124313027.

The spelling of 78519552 in words is "seventy-eight million, five hundred nineteen thousand, five hundred fifty-two".