78854840 has 32 divisors (see below), whose sum is σ = 187861680. Its totient is φ = 29686272.

The previous prime is 78854821. The next prime is 78854869. The reversal of 78854840 is 4845887.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 78854791 and 78854800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57302 + ... + 58661.

Almost surely, 2^78854840 is an apocalyptic number.

It is an amenable number.

78854840 is an abundant number, since it is smaller than the sum of its proper divisors (109006840).

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

78854840 is a wasteful number, since it uses less digits than its factorization.

78854840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115991 (or 115987 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 44.

The square root of 78854840 is about 8880.0247747402. The cubic root of 78854840 is about 428.8210721201.

The spelling of 78854840 in words is "seventy-eight million, eight hundred fifty-four thousand, eight hundred forty".