78145280 has 36 divisors (see below), whose sum is σ = 187185432. Its totient is φ = 31257600.

The previous prime is 78145279. The next prime is 78145313. The reversal of 78145280 is 8254187.

It is a super-2 number, since 2×78145280² = 12213369572556800, 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 78145280.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29246 + ... + 31805.

Almost surely, 2^78145280 is an apocalyptic number.

It is an amenable number.

78145280 is an abundant number, since it is smaller than the sum of its proper divisors (109040152).

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

78145280 is an equidigital number, since it uses as much as digits as its factorization.

78145280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61072 (or 61058 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 78145280 is about 8839.9819004340. The cubic root of 78145280 is about 427.5309736686.

The spelling of 78145280 in words is "seventy-eight million, one hundred forty-five thousand, two hundred eighty".