2019778464 has 288 divisors, whose sum is σ = 6177669120. Its totient is φ = 576576000.

The previous prime is 2019778429. The next prime is 2019778561. The reversal of 2019778464 is 4648779102.

2019778464 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25566777 + ... + 25566855.

It is an arithmetic number, because the mean of its divisors is an integer number (21450240).

Almost surely, 2^2019778464 is an apocalyptic number.

2019778464 is a gapful number since it is divisible by the number (24) 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 2019778464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3088834560).

2019778464 is an abundant number, since it is smaller than the sum of its proper divisors (4157890656).

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

2019778464 is a wasteful number, since it uses less digits than its factorization.

2019778464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 48.

The square root of 2019778464 is about 44941.9454852591. The cubic root of 2019778464 is about 1264.0606510981.

The spelling of 2019778464 in words is "two billion, nineteen million, seven hundred seventy-eight thousand, four hundred sixty-four".