2781642396 has 24 divisors (see below), whose sum is σ = 6989768464. Its totient is φ = 855889920.

The previous prime is 2781642371. The next prime is 2781642397. The reversal of 2781642396 is 6932461872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781642397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8915365 + ... + 8915676.

Almost surely, 2^2781642396 is an apocalyptic number.

2781642396 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2781642396 is an abundant number, since it is smaller than the sum of its proper divisors (4208126068).

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

2781642396 is a wasteful number, since it uses less digits than its factorization.

2781642396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17831061 (or 17831059 counting only the distinct ones).

The product of its digits is 870912, while the sum is 48.

The square root of 2781642396 is about 52741.2779139831. The cubic root of 2781642396 is about 1406.3727157937.

The spelling of 2781642396 in words is "two billion, seven hundred eighty-one million, six hundred forty-two thousand, three hundred ninety-six".