78292452 has 96 divisors (see below), whose sum is σ = 216760320. Its totient is φ = 21530880.

The previous prime is 78292451. The next prime is 78292457. The reversal of 78292452 is 25429287.

It is a super-2 number, since 2×78292452² = 12259416080344608, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78292452.

It is not an unprimeable number, because it can be changed into a prime (78292451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 437299 + ... + 437477.

It is an arithmetic number, because the mean of its divisors is an integer number (2257920).

Almost surely, 2^78292452 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 78292452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108380160).

78292452 is an abundant number, since it is smaller than the sum of its proper divisors (138467868).

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

78292452 is a wasteful number, since it uses less digits than its factorization.

78292452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361 (or 359 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 78292452 is about 8848.3022100288. The cubic root of 78292452 is about 427.7991968636.

The spelling of 78292452 in words is "seventy-eight million, two hundred ninety-two thousand, four hundred fifty-two".