78452280 has 128 divisors (see below), whose sum is σ = 276955200. Its totient is φ = 19685376.

The previous prime is 78452267. The next prime is 78452317. The reversal of 78452280 is 8225487.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16224 + ... + 20496.

Almost surely, 2^78452280 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 78452280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138477600).

78452280 is an abundant number, since it is smaller than the sum of its proper divisors (198502920).

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

78452280 is a wasteful number, since it uses less digits than its factorization.

78452280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4310 (or 4300 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 78452280 is about 8857.3291685474. The cubic root of 78452280 is about 428.0901053485.

The spelling of 78452280 in words is "seventy-eight million, four hundred fifty-two thousand, two hundred eighty".