3998357 has 8 divisors (see below), whose sum is σ = 4405440. Its totient is φ = 3598560.

The previous prime is 3998353. The next prime is 3998369. The reversal of 3998357 is 7538993.

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 3998357 - 2² = 3998353 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3998353) 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, 632 + ... + 2897.

It is an arithmetic number, because the mean of its divisors is an integer number (550680).

Almost surely, 2^3998357 is an apocalyptic number.

It is an amenable number.

3998357 is a deficient number, since it is larger than the sum of its proper divisors (407083).

3998357 is a wasteful number, since it uses less digits than its factorization.

3998357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3643.

The product of its digits is 204120, while the sum is 44.

The square root of 3998357 is about 1999.5892078124. The cubic root of 3998357 is about 158.7183680543.

The spelling of 3998357 in words is "three million, nine hundred ninety-eight thousand, three hundred fifty-seven".