2921900 has 36 divisors (see below), whose sum is σ = 6457920. Its totient is φ = 1147200.

The previous prime is 2921899. The next prime is 2921903. The reversal of 2921900 is 91292.

2921900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2921900² = 17074999220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2921903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5861 + ... + 6339.

2^2921900 is an apocalyptic number.

2921900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2921900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3228960).

2921900 is an abundant number, since it is smaller than the sum of its proper divisors (3536020).

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

2921900 is a wasteful number, since it uses less digits than its factorization.

2921900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 2921900 is about 1709.3566041058. The cubic root of 2921900 is about 142.9623843553.

The spelling of 2921900 in words is "two million, nine hundred twenty-one thousand, nine hundred".