988877777 has 8 divisors (see below), whose sum is σ = 1049241600. Its totient is φ = 928757824.

The previous prime is 988877761. The next prime is 988877797. The reversal of 988877777 is 777778889.

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

It is a cyclic number.

It is not a de Polignac number, because 988877777 - 2⁴ = 988877761 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (988877797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52577 + ... + 68862.

It is an arithmetic number, because the mean of its divisors is an integer number (131155200).

Almost surely, 2^988877777 is an apocalyptic number.

It is an amenable number.

988877777 is a deficient number, since it is larger than the sum of its proper divisors (60363823).

988877777 is a wasteful number, since it uses less digits than its factorization.

988877777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121935.

The product of its digits is 77446656, while the sum is 68.

The square root of 988877777 is about 31446.4270943457. The cubic root of 988877777 is about 996.2787618971.

The spelling of 988877777 in words is "nine hundred eighty-eight million, eight hundred seventy-seven thousand, seven hundred seventy-seven".