3998758 has 4 divisors (see below), whose sum is σ = 5998140. Its totient is φ = 1999378.

The previous prime is 3998749. The next prime is 3998773. The reversal of 3998758 is 8578993.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 999688 + ... + 999691.

It is an arithmetic number, because the mean of its divisors is an integer number (1499535).

Almost surely, 2^3998758 is an apocalyptic number.

3998758 is a deficient number, since it is larger than the sum of its proper divisors (1999382).

3998758 is a wasteful number, since it uses less digits than its factorization.

3998758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999381.

The product of its digits is 544320, while the sum is 49.

The square root of 3998758 is about 1999.6894758937. The cubic root of 3998758 is about 158.7236738952.

The spelling of 3998758 in words is "three million, nine hundred ninety-eight thousand, seven hundred fifty-eight".