4011990 has 16 divisors (see below), whose sum is σ = 9628848. Its totient is φ = 1069856.

The previous prime is 4011979. The next prime is 4011991. The reversal of 4011990 is 991104.

It is a self number, because there is not a number n which added to its sum of digits gives 4011990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4011991) 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, 66837 + ... + 66896.

It is an arithmetic number, because the mean of its divisors is an integer number (601803).

Almost surely, 2^4011990 is an apocalyptic number.

4011990 is an abundant number, since it is smaller than the sum of its proper divisors (5616858).

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

4011990 is a wasteful number, since it uses less digits than its factorization.

4011990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133743.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 4011990 is about 2002.9952571087. The cubic root of 4011990 is about 158.8985548063.

The spelling of 4011990 in words is "four million, eleven thousand, nine hundred ninety".