2921380 has 72 divisors (see below), whose sum is σ = 7814016. Its totient is φ = 907200.

The previous prime is 2921371. The next prime is 2921417. The reversal of 2921380 is 831292.

It is a super-2 number, since 2×2921380² = 17068922208800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10645 + ... + 10915.

It is an arithmetic number, because the mean of its divisors is an integer number (108528).

2^2921380 is an apocalyptic number.

2921380 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 2921380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3907008).

2921380 is an abundant number, since it is smaller than the sum of its proper divisors (4892636).

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

2921380 is a wasteful number, since it uses less digits than its factorization.

2921380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305 (or 296 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 2921380 is about 1709.2044933243. The cubic root of 2921380 is about 142.9539030189.

The spelling of 2921380 in words is "two million, nine hundred twenty-one thousand, three hundred eighty".