77871486 has 96 divisors (see below), whose sum is σ = 200275200. Its totient is φ = 20124720.

The previous prime is 77871439. The next prime is 77871499. The reversal of 77871486 is 68417877.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 391215 + ... + 391413.

It is an arithmetic number, because the mean of its divisors is an integer number (2086200).

Almost surely, 2^77871486 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77871486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100137600).

77871486 is an abundant number, since it is smaller than the sum of its proper divisors (122403714).

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

77871486 is a wasteful number, since it uses less digits than its factorization.

77871486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251 (or 222 counting only the distinct ones).

The product of its digits is 526848, while the sum is 48.

The square root of 77871486 is about 8824.4821944406. The cubic root of 77871486 is about 427.0310825712.

The spelling of 77871486 in words is "seventy-seven million, eight hundred seventy-one thousand, four hundred eighty-six".