4057998 has 32 divisors (see below), whose sum is σ = 9455616. Its totient is φ = 1136928.

The previous prime is 4057969. The next prime is 4058011. The reversal of 4057998 is 8997504.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1315 + ... + 3137.

It is an arithmetic number, because the mean of its divisors is an integer number (295488).

Almost surely, 2^4057998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4057998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4727808).

4057998 is an abundant number, since it is smaller than the sum of its proper divisors (5397618).

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

4057998 is a wasteful number, since it uses less digits than its factorization.

4057998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1888.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 4057998 is about 2014.4473187453. The cubic root of 4057998 is about 159.5036440764.

The spelling of 4057998 in words is "four million, fifty-seven thousand, nine hundred ninety-eight".