2796809840 has 40 divisors (see below), whose sum is σ = 7093729008. Its totient is φ = 1017021440.

The previous prime is 2796809837. The next prime is 2796809881. The reversal of 2796809840 is 489086972.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×2796809840² = 15644290562241651200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1588217 + ... + 1589976.

Almost surely, 2^2796809840 is an apocalyptic number.

2796809840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2796809840 is an abundant number, since it is smaller than the sum of its proper divisors (4296919168).

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

2796809840 is a wasteful number, since it uses less digits than its factorization.

2796809840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3178217 (or 3178211 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 53.

The square root of 2796809840 is about 52884.8734516780. The cubic root of 2796809840 is about 1408.9242570280.

The spelling of 2796809840 in words is "two billion, seven hundred ninety-six million, eight hundred nine thousand, eight hundred forty".