3969138 has 32 divisors (see below), whose sum is σ = 8591040. Its totient is φ = 1218240.

The previous prime is 3969137. The next prime is 3969151. The reversal of 3969138 is 8319693.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 3969096 and 3969105.

It is not an unprimeable number, because it can be changed into a prime (3969137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3748 + ... + 4688.

It is an arithmetic number, because the mean of its divisors is an integer number (268470).

Almost surely, 2^3969138 is an apocalyptic number.

3969138 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3969138 is an abundant number, since it is smaller than the sum of its proper divisors (4621902).

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

3969138 is a wasteful number, since it uses less digits than its factorization.

3969138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002.

The product of its digits is 34992, while the sum is 39.

The square root of 3969138 is about 1992.2695600746. The cubic root of 3969138 is about 158.3307976202.

The spelling of 3969138 in words is "three million, nine hundred sixty-nine thousand, one hundred thirty-eight".