78145028 has 24 divisors (see below), whose sum is σ = 149775360. Its totient is φ = 35454240.

The previous prime is 78145021. The next prime is 78145033. The reversal of 78145028 is 82054187.

It is a super-2 number, since 2×78145028² = 12213290802241568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78145021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9668 + ... + 15803.

It is an arithmetic number, because the mean of its divisors is an integer number (6240640).

Almost surely, 2^78145028 is an apocalyptic number.

It is an amenable number.

78145028 is a deficient number, since it is larger than the sum of its proper divisors (71630332).

78145028 is a wasteful number, since it uses less digits than its factorization.

78145028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25547 (or 25545 counting only the distinct ones).

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

The square root of 78145028 is about 8839.9676469996. The cubic root of 78145028 is about 427.5305141061.

The spelling of 78145028 in words is "seventy-eight million, one hundred forty-five thousand, twenty-eight".