77127982 has 8 divisors (see below), whose sum is σ = 118382616. Its totient is φ = 37667112.

The previous prime is 77127979. The next prime is 77127983. The reversal of 77127982 is 28972177.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77127983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 448333 + ... + 448504.

It is an arithmetic number, because the mean of its divisors is an integer number (14797827).

Almost surely, 2^77127982 is an apocalyptic number.

77127982 is a deficient number, since it is larger than the sum of its proper divisors (41254634).

77127982 is a wasteful number, since it uses less digits than its factorization.

77127982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896882.

The product of its digits is 98784, while the sum is 43.

The square root of 77127982 is about 8782.2538109531. The cubic root of 77127982 is about 425.6676601532.

The spelling of 77127982 in words is "seventy-seven million, one hundred twenty-seven thousand, nine hundred eighty-two".