2019428400 has 240 divisors, whose sum is σ = 7179361920. Its totient is φ = 481075200.

The previous prime is 2019428399. The next prime is 2019428407. The reversal of 2019428400 is 48249102.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (2019428407) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 777504 + ... + 780096.

It is an arithmetic number, because the mean of its divisors is an integer number (29914008).

Almost surely, 2^2019428400 is an apocalyptic number.

2019428400 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 2019428400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3589680960).

2019428400 is an abundant number, since it is smaller than the sum of its proper divisors (5159933520).

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

2019428400 is a wasteful number, since it uses less digits than its factorization.

2019428400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684 (or 2673 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 2019428400 is about 44938.0506920360. The cubic root of 2019428400 is about 1263.9876187165.

The spelling of 2019428400 in words is "two billion, nineteen million, four hundred twenty-eight thousand, four hundred".