78897948 has 48 divisors (see below), whose sum is σ = 190270080. Its totient is φ = 25429824.

The previous prime is 78897947. The next prime is 78897961. The reversal of 78897948 is 84979887.

It is a super-2 number, since 2×78897948² = 12449772397221408, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78897891 and 78897900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78897943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54498 + ... + 55926.

It is an arithmetic number, because the mean of its divisors is an integer number (3963960).

Almost surely, 2^78897948 is an apocalyptic number.

It is an amenable number.

78897948 is an abundant number, since it is smaller than the sum of its proper divisors (111372132).

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

78897948 is a wasteful number, since it uses less digits than its factorization.

78897948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586 (or 1584 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 60.

The square root of 78897948 is about 8882.4516885824. The cubic root of 78897948 is about 428.8991998599.

The spelling of 78897948 in words is "seventy-eight million, eight hundred ninety-seven thousand, nine hundred forty-eight".