78571552 has 48 divisors (see below), whose sum is σ = 165586680. Its totient is φ = 36569088.

The previous prime is 78571523. The next prime is 78571567. The reversal of 78571552 is 25517587.

It can be written as a sum of positive squares in 4 ways, for example, as 65351056 + 13220496 = 8084^2 + 3636^2 .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 52024 + ... + 53512.

Almost surely, 2^78571552 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 78571552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82793340).

78571552 is an abundant number, since it is smaller than the sum of its proper divisors (87015128).

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

78571552 is a wasteful number, since it uses less digits than its factorization.

78571552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1613 (or 1605 counting only the distinct ones).

The product of its digits is 98000, while the sum is 40.

The square root of 78571552 is about 8864.0595665869. The cubic root of 78571552 is about 428.3069391129.

It can be divided in two parts, 7857 and 1552, that multiplied together give a square (12194064 = 3492²).

The spelling of 78571552 in words is "seventy-eight million, five hundred seventy-one thousand, five hundred fifty-two".