5451840 has 112 divisors (see below), whose sum is σ = 19263360. Its totient is φ = 1451520.

The previous prime is 5451833. The next prime is 5451847. The reversal of 5451840 is 481545.

It is an interprime number because it is at equal distance from previous prime (5451833) and next prime (5451847).

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 (5451847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8325 + ... + 8955.

Almost surely, 2^5451840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5451840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9631680).

5451840 is an abundant number, since it is smaller than the sum of its proper divisors (13811520).

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

5451840 is a wasteful number, since it uses less digits than its factorization.

5451840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 5451840 is about 2334.9175574311. The cubic root of 5451840 is about 176.0006887025. Note that the first 3 decimals are identical.

The spelling of 5451840 in words is "five million, four hundred fifty-one thousand, eight hundred forty".