5421640400 has 120 divisors (see below), whose sum is σ = 14357247744. Its totient is φ = 1951027200.

The previous prime is 5421640381. The next prime is 5421640409. The reversal of 5421640400 is 40461245.

It is a self number, because there is not a number n which added to its sum of digits gives 5421640400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5421640409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 420449 + ... + 433151.

Almost surely, 2^5421640400 is an apocalyptic number.

5421640400 is a gapful number since it is divisible by the number (50) 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 5421640400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7178623872).

5421640400 is an abundant number, since it is smaller than the sum of its proper divisors (8935607344).

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

5421640400 is a wasteful number, since it uses less digits than its factorization.

5421640400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12829 (or 12818 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 5421640400 is about 73631.7893304244. The cubic root of 5421640400 is about 1756.7511086362.

The spelling of 5421640400 in words is "five billion, four hundred twenty-one million, six hundred forty thousand, four hundred".