2489777784 has 256 divisors, whose sum is σ = 8184960000. Its totient is φ = 693868032.

The previous prime is 2489777743. The next prime is 2489777813. The reversal of 2489777784 is 4877779842.

2489777784 is a `hidden beast` number, since 2 + 489 + 7 + 7 + 77 + 84 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1226082 + ... + 1228110.

It is an arithmetic number, because the mean of its divisors is an integer number (31972500).

Almost surely, 2^2489777784 is an apocalyptic number.

2489777784 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 2489777784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4092480000).

2489777784 is an abundant number, since it is smaller than the sum of its proper divisors (5695182216).

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

2489777784 is a wasteful number, since it uses less digits than its factorization.

2489777784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2099 (or 2089 counting only the distinct ones).

The product of its digits is 44255232, while the sum is 63.

The square root of 2489777784 is about 49897.6731321211. The cubic root of 2489777784 is about 1355.3564571014.

The spelling of 2489777784 in words is "two billion, four hundred eighty-nine million, seven hundred seventy-seven thousand, seven hundred eighty-four".