78278050028 has 48 divisors (see below), whose sum is σ = 143333326080. Its totient is φ = 37362124800.

The previous prime is 78278049989. The next prime is 78278050031. The reversal of 78278050028 is 82005087287.

It is a super-2 number, since 2×78278050028² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4770398 + ... + 4786778.

It is an arithmetic number, because the mean of its divisors is an integer number (2986110960).

Almost surely, 2^78278050028 is an apocalyptic number.

It is an amenable number.

78278050028 is a deficient number, since it is larger than the sum of its proper divisors (65055276052).

78278050028 is a wasteful number, since it uses less digits than its factorization.

78278050028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16938 (or 16936 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 47.

The spelling of 78278050028 in words is "seventy-eight billion, two hundred seventy-eight million, fifty thousand, twenty-eight".