2780028120 has 32 divisors (see below), whose sum is σ = 8340084720. Its totient is φ = 741340800.

The previous prime is 2780028109. The next prime is 2780028151. The reversal of 2780028120 is 218200872.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 11583331 + ... + 11583570.

Almost surely, 2^2780028120 is an apocalyptic number.

2780028120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2780028120 is an abundant number, since it is smaller than the sum of its proper divisors (5560056600).

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

2780028120 is a wasteful number, since it uses less digits than its factorization.

2780028120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23166915 (or 23166911 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 2780028120 is about 52725.9719682814. The cubic root of 2780028120 is about 1406.1006088018.

Adding to 2780028120 its reverse (218200872), we get a palindrome (2998228992).

The spelling of 2780028120 in words is "two billion, seven hundred eighty million, twenty-eight thousand, one hundred twenty".