2780833500 has 72 divisors (see below), whose sum is σ = 8772616944. Its totient is φ = 741554400.

The previous prime is 2780833493. The next prime is 2780833507. The reversal of 2780833500 is 53380872.

2780833500 is a `hidden beast` number, since 2 + 78 + 0 + 83 + 3 + 500 = 666.

It is an interprime number because it is at equal distance from previous prime (2780833493) and next prime (2780833507).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2780833507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 304482 + ... + 313481.

It is an arithmetic number, because the mean of its divisors is an integer number (121841902).

Almost surely, 2^2780833500 is an apocalyptic number.

2780833500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2780833500 is an abundant number, since it is smaller than the sum of its proper divisors (5991783444).

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

2780833500 is a wasteful number, since it uses less digits than its factorization.

2780833500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617988 (or 617973 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 2780833500 is about 52733.6088277675. The cubic root of 2780833500 is about 1406.2363791273.

The spelling of 2780833500 in words is "two billion, seven hundred eighty million, eight hundred thirty-three thousand, five hundred".