78369648 has 80 divisors (see below), whose sum is σ = 241460736. Its totient is φ = 21415680.

The previous prime is 78369631. The next prime is 78369649. The reversal of 78369648 is 84696387.

It is a super-2 number, since 2×78369648² = 12283603455287808, 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 78369648.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78369649) 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, 2658 + ... + 12798.

Almost surely, 2^78369648 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 78369648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120730368).

78369648 is an abundant number, since it is smaller than the sum of its proper divisors (163091088).

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

78369648 is a wasteful number, since it uses less digits than its factorization.

78369648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10182 (or 10176 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 51.

The square root of 78369648 is about 8852.6633280612. The cubic root of 78369648 is about 427.9397533623.

The spelling of 78369648 in words is "seventy-eight million, three hundred sixty-nine thousand, six hundred forty-eight".