2388989977 has 4 divisors (see below), whose sum is σ = 2606170896. Its totient is φ = 2171809060.

The previous prime is 2388989969. The next prime is 2388990047. The reversal of 2388989977 is 7799898832.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2388989977 - 2³ = 2388989969 is a prime.

It is a super-2 number, since 2×2388989977² = 11414546220412921058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2388989077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108590443 + ... + 108590464.

It is an arithmetic number, because the mean of its divisors is an integer number (651542724).

Almost surely, 2^2388989977 is an apocalyptic number.

It is an amenable number.

2388989977 is a deficient number, since it is larger than the sum of its proper divisors (217180919).

2388989977 is a wasteful number, since it uses less digits than its factorization.

2388989977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217180918.

The product of its digits is 109734912, while the sum is 70.

The square root of 2388989977 is about 48877.2951072377. The cubic root of 2388989977 is about 1336.8154080271.

The spelling of 2388989977 in words is "two billion, three hundred eighty-eight million, nine hundred eighty-nine thousand, nine hundred seventy-seven".