2897140 has 24 divisors (see below), whose sum is σ = 6442632. Its totient is φ = 1090560.

The previous prime is 2897131. The next prime is 2897171. The reversal of 2897140 is 417982.

2897140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 574564 + 2322576 = 758^2 + 1524^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3921 + ... + 4600.

It is an arithmetic number, because the mean of its divisors is an integer number (268443).

2^2897140 is an apocalyptic number.

2897140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2897140 is an abundant number, since it is smaller than the sum of its proper divisors (3545492).

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

2897140 is a wasteful number, since it uses less digits than its factorization.

2897140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8547 (or 8545 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 2897140 is about 1702.0987045410. The cubic root of 2897140 is about 142.5574201754.

The spelling of 2897140 in words is "two million, eight hundred ninety-seven thousand, one hundred forty".