1988676813 has 8 divisors (see below), whose sum is σ = 2807543808. Its totient is φ = 1247797184.

The previous prime is 1988676803. The next prime is 1988676817. The reversal of 1988676813 is 3186768891.

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 1988676813 - 2¹⁰ = 1988675789 is a prime.

It is a super-4 number, since 4×1988676813⁴ (a number of 38 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988676817) 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, 19496781 + ... + 19496882.

It is an arithmetic number, because the mean of its divisors is an integer number (350942976).

Almost surely, 2^1988676813 is an apocalyptic number.

It is an amenable number.

1988676813 is a deficient number, since it is larger than the sum of its proper divisors (818866995).

1988676813 is a wasteful number, since it uses less digits than its factorization.

1988676813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38993683.

The product of its digits is 3483648, while the sum is 57.

The square root of 1988676813 is about 44594.5827763866. The cubic root of 1988676813 is about 1257.5388282235.

The spelling of 1988676813 in words is "one billion, nine hundred eighty-eight million, six hundred seventy-six thousand, eight hundred thirteen".