78425980 has 24 divisors (see below), whose sum is σ = 168526512. Its totient is φ = 30640512.

The previous prime is 78425933. The next prime is 78425987. The reversal of 78425980 is 8952487.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78425987) 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, 44737 + ... + 46456.

It is an arithmetic number, because the mean of its divisors is an integer number (7021938).

Almost surely, 2^78425980 is an apocalyptic number.

It is an amenable number.

78425980 is an abundant number, since it is smaller than the sum of its proper divisors (90100532).

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

78425980 is a wasteful number, since it uses less digits than its factorization.

78425980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91245 (or 91243 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 78425980 is about 8855.8443979103. The cubic root of 78425980 is about 428.0422629824.

The spelling of 78425980 in words is "seventy-eight million, four hundred twenty-five thousand, nine hundred eighty".