3998955 has 24 divisors (see below), whose sum is σ = 6647472. Its totient is φ = 2052736.

The previous prime is 3998899. The next prime is 3998959. The reversal of 3998955 is 5598993.

It is not a de Polignac number, because 3998955 - 2²¹ = 1901803 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3998959) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12457 + ... + 12773.

It is an arithmetic number, because the mean of its divisors is an integer number (276978).

Almost surely, 2^3998955 is an apocalyptic number.

3998955 is a deficient number, since it is larger than the sum of its proper divisors (2648517).

3998955 is a wasteful number, since it uses less digits than its factorization.

3998955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383 (or 354 counting only the distinct ones).

The product of its digits is 437400, while the sum is 48.

The square root of 3998955 is about 1999.7387329349. The cubic root of 3998955 is about 158.7262803753.

The spelling of 3998955 in words is "three million, nine hundred ninety-eight thousand, nine hundred fifty-five".