2784545840 has 40 divisors (see below), whose sum is σ = 6624637008. Its totient is φ = 1087914240.

The previous prime is 2784545839. The next prime is 2784545857. The reversal of 2784545840 is 485454872.

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

It is a super-2 number, since 2×2784545840² = 15507391070122611200, which contains 22 as substring.

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, 401291 + ... + 408170.

Almost surely, 2^2784545840 is an apocalyptic number.

2784545840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2784545840 is an abundant number, since it is smaller than the sum of its proper divisors (3840091168).

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

2784545840 is a wasteful number, since it uses less digits than its factorization.

2784545840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809517 (or 809511 counting only the distinct ones).

The product of its (nonzero) digits is 1433600, while the sum is 47.

The square root of 2784545840 is about 52768.7960825335. The cubic root of 2784545840 is about 1406.8618638050.

The spelling of 2784545840 in words is "two billion, seven hundred eighty-four million, five hundred forty-five thousand, eight hundred forty".