2781336492 has 216 divisors, whose sum is σ = 8179691520. Its totient is φ = 795009600.

The previous prime is 2781336473. The next prime is 2781336539. The reversal of 2781336492 is 2946331872.

2781336492 is a `hidden beast` number, since 27 + 8 + 133 + 6 + 492 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5806309 + ... + 5806787.

Almost surely, 2^2781336492 is an apocalyptic number.

2781336492 is a gapful number since it is divisible by the number (22) 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 2781336492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4089845760).

2781336492 is an abundant number, since it is smaller than the sum of its proper divisors (5398355028).

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

2781336492 is a wasteful number, since it uses less digits than its factorization.

2781336492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585 (or 569 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 2781336492 is about 52738.3777907512. The cubic root of 2781336492 is about 1406.3211598243.

The spelling of 2781336492 in words is "two billion, seven hundred eighty-one million, three hundred thirty-six thousand, four hundred ninety-two".