2780677928 has 32 divisors (see below), whose sum is σ = 6150812160. Its totient is φ = 1153275840.

The previous prime is 2780677927. The next prime is 2780677969. The reversal of 2780677928 is 8297760872.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is not an unprimeable number, because it can be changed into a prime (2780677927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 799151 + ... + 802622.

It is an arithmetic number, because the mean of its divisors is an integer number (192212880).

Almost surely, 2^2780677928 is an apocalyptic number.

2780677928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2780677928 is an abundant number, since it is smaller than the sum of its proper divisors (3370134232).

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

2780677928 is a wasteful number, since it uses less digits than its factorization.

2780677928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601817 (or 1601813 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 56.

The square root of 2780677928 is about 52732.1337326682. The cubic root of 2780677928 is about 1406.2101549652.

The spelling of 2780677928 in words is "two billion, seven hundred eighty million, six hundred seventy-seven thousand, nine hundred twenty-eight".