3968888694 has 64 divisors (see below), whose sum is σ = 8526076416. Its totient is φ = 1228449024.

The previous prime is 3968888687. The next prime is 3968888743. The reversal of 3968888694 is 4968888693.

It is a super-2 number, since 2×3968888694² = 31504154930722051272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4375389 + ... + 4376295.

It is an arithmetic number, because the mean of its divisors is an integer number (133219944).

Almost surely, 2^3968888694 is an apocalyptic number.

3968888694 is an abundant number, since it is smaller than the sum of its proper divisors (4557187722).

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

3968888694 is a wasteful number, since it uses less digits than its factorization.

3968888694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829.

The product of its digits is 143327232, while the sum is 69.

The square root of 3968888694 is about 62999.1166128542. The cubic root of 3968888694 is about 1583.2748257260.

Subtracting 3968888694 from its reverse (4968888693), we obtain a palindrome (999999999).

The spelling of 3968888694 in words is "three billion, nine hundred sixty-eight million, eight hundred eighty-eight thousand, six hundred ninety-four".