78487452 has 36 divisors (see below), whose sum is σ = 198984240. Its totient is φ = 26085312.

The previous prime is 78487429. The next prime is 78487457. The reversal of 78487452 is 25478487.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 78487398 and 78487407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78487457) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9888 + ... + 15960.

It is an arithmetic number, because the mean of its divisors is an integer number (5527340).

Almost surely, 2^78487452 is an apocalyptic number.

It is an amenable number.

78487452 is an abundant number, since it is smaller than the sum of its proper divisors (120496788).

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

78487452 is a wasteful number, since it uses less digits than its factorization.

78487452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6442 (or 6437 counting only the distinct ones).

The product of its digits is 501760, while the sum is 45.

The square root of 78487452 is about 8859.3144204278. The cubic root of 78487452 is about 428.1540700740.

The spelling of 78487452 in words is "seventy-eight million, four hundred eighty-seven thousand, four hundred fifty-two".