3898739 has 4 divisors (see below), whose sum is σ = 4198656. Its totient is φ = 3598824.

The previous prime is 3898717. The next prime is 3898747. The reversal of 3898739 is 9378983.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3898739 - 2⁸ = 3898483 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3898693 and 3898702.

It is not an unprimeable number, because it can be changed into a prime (3898639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149939 + ... + 149964.

It is an arithmetic number, because the mean of its divisors is an integer number (1049664).

Almost surely, 2^3898739 is an apocalyptic number.

3898739 is a deficient number, since it is larger than the sum of its proper divisors (299917).

3898739 is a wasteful number, since it uses less digits than its factorization.

3898739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299916.

The product of its digits is 326592, while the sum is 47.

The square root of 3898739 is about 1974.5224739162. The cubic root of 3898739 is about 157.3891249556.

The spelling of 3898739 in words is "three million, eight hundred ninety-eight thousand, seven hundred thirty-nine".