11621990 has 16 divisors (see below), whose sum is σ = 21215520. Its totient is φ = 4583040.

The previous prime is 11621989. The next prime is 11622001. The reversal of 11621990 is 9912611.

11621990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 7475 + ... + 8894.

It is an arithmetic number, because the mean of its divisors is an integer number (1325970).

Almost surely, 2^11621990 is an apocalyptic number.

11621990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11621990 is a deficient number, since it is larger than the sum of its proper divisors (9593530).

11621990 is a wasteful number, since it uses less digits than its factorization.

11621990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16447.

The product of its (nonzero) digits is 972, while the sum is 29.

The square root of 11621990 is about 3409.1039878537. The cubic root of 11621990 is about 226.5131914731.

The spelling of 11621990 in words is "eleven million, six hundred twenty-one thousand, nine hundred ninety".