2011958 has 8 divisors (see below), whose sum is σ = 3250128. Its totient is φ = 928584.

The previous prime is 2011957. The next prime is 2011973. The reversal of 2011958 is 8591102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 77383 = 2011958 / (2 + 0 + 1 + 1 + 9 + 5 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38666 + ... + 38717.

It is an arithmetic number, because the mean of its divisors is an integer number (406266).

2^2011958 is an apocalyptic number.

2011958 is a deficient number, since it is larger than the sum of its proper divisors (1238170).

2011958 is a wasteful number, since it uses less digits than its factorization.

2011958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77398.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 2011958 is about 1418.4350531484. The cubic root of 2011958 is about 126.2427084636.

The spelling of 2011958 in words is "two million, eleven thousand, nine hundred fifty-eight".