4128990 has 16 divisors (see below), whose sum is σ = 9909648. Its totient is φ = 1101056.

The previous prime is 4128967. The next prime is 4129003. The reversal of 4128990 is 998214.

It is a Smith number, since the sum of its digits (33) 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 in 7 ways as a sum of consecutive naturals, for example, 68787 + ... + 68846.

It is an arithmetic number, because the mean of its divisors is an integer number (619353).

Almost surely, 2^4128990 is an apocalyptic number.

4128990 is an abundant number, since it is smaller than the sum of its proper divisors (5780658).

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

4128990 is a wasteful number, since it uses less digits than its factorization.

4128990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137643.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 4128990 is about 2031.9916338410. The cubic root of 4128990 is about 160.4284091777.

The spelling of 4128990 in words is "four million, one hundred twenty-eight thousand, nine hundred ninety".