2840454 has 32 divisors (see below), whose sum is σ = 6589440. Its totient is φ = 905256.

The previous prime is 2840449. The next prime is 2840459. The reversal of 2840454 is 4540482.

It is an interprime number because it is at equal distance from previous prime (2840449) and next prime (2840459).

It is a super-2 number, since 2×2840454² = 16136357852232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2840459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99 + ... + 2385.

It is an arithmetic number, because the mean of its divisors is an integer number (205920).

2^2840454 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2840454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3294720).

2840454 is an abundant number, since it is smaller than the sum of its proper divisors (3748986).

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

2840454 is a wasteful number, since it uses less digits than its factorization.

2840454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2321 (or 2315 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 2840454 is about 1685.3646489707. The cubic root of 2840454 is about 141.6215207164.

It can be divided in two parts, 2 and 840454, that added together give a triangular number (840456 = T₁₂₉₆).

The spelling of 2840454 in words is "two million, eight hundred forty thousand, four hundred fifty-four".