78417876828 has 48 divisors (see below), whose sum is σ = 193818883104. Its totient is φ = 24591452160.

The previous prime is 78417876827. The next prime is 78417876829. The reversal of 78417876828 is 82867871487.

It is an interprime number because it is at equal distance from previous prime (78417876827) and next prime (78417876829).

It is a super-2 number, since 2×78417876828² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78417876827) 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, 419226 + ... + 576702.

It is an arithmetic number, because the mean of its divisors is an integer number (4037893398).

Almost surely, 2^78417876828 is an apocalyptic number.

It is an amenable number.

78417876828 is an abundant number, since it is smaller than the sum of its proper divisors (115401006276).

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

78417876828 is a wasteful number, since it uses less digits than its factorization.

78417876828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159942 (or 159940 counting only the distinct ones).

The product of its digits is 67436544, while the sum is 66.

The spelling of 78417876828 in words is "seventy-eight billion, four hundred seventeen million, eight hundred seventy-six thousand, eight hundred twenty-eight".