2921898 has 32 divisors (see below), whose sum is σ = 6777216. Its totient is φ = 822528.

The previous prime is 2921881. The next prime is 2921899. The reversal of 2921898 is 8981292.

2921898 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (2921899) 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 15 ways as a sum of consecutive naturals, for example, 2590 + ... + 3542.

It is an arithmetic number, because the mean of its divisors is an integer number (211788).

2^2921898 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2921898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3388608).

2921898 is an abundant number, since it is smaller than the sum of its proper divisors (3855318).

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

2921898 is a wasteful number, since it uses less digits than its factorization.

2921898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038.

The product of its digits is 20736, while the sum is 39.

The square root of 2921898 is about 1709.3560190902. The cubic root of 2921898 is about 142.9623517367.

The spelling of 2921898 in words is "two million, nine hundred twenty-one thousand, eight hundred ninety-eight".