3988694 has 4 divisors (see below), whose sum is σ = 5983044. Its totient is φ = 1994346.

The previous prime is 3988687. The next prime is 3988703. The reversal of 3988694 is 4968893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4968893 = 157 ⋅31649.

It is a super-3 number, since 3×3988694³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997172 + ... + 997175.

It is an arithmetic number, because the mean of its divisors is an integer number (1495761).

Almost surely, 2^3988694 is an apocalyptic number.

3988694 is a deficient number, since it is larger than the sum of its proper divisors (1994350).

3988694 is a wasteful number, since it uses less digits than its factorization.

3988694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994349.

The product of its digits is 373248, while the sum is 47.

The square root of 3988694 is about 1997.1714998968. The cubic root of 3988694 is about 158.5904044293.

It can be divided in two parts, 3988 and 694, that multiplied together give a palindrome (2767672).

The spelling of 3988694 in words is "three million, nine hundred eighty-eight thousand, six hundred ninety-four".