2780385428 has 24 divisors (see below), whose sum is σ = 5163681600. Its totient is φ = 1305422208.

The previous prime is 2780385427. The next prime is 2780385449. The reversal of 2780385428 is 8245830872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2780385427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16718 + ... + 76421.

It is an arithmetic number, because the mean of its divisors is an integer number (215153400).

Almost surely, 2^2780385428 is an apocalyptic number.

It is an amenable number.

2780385428 is a deficient number, since it is larger than the sum of its proper divisors (2383296172).

2780385428 is a wasteful number, since it uses less digits than its factorization.

2780385428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93599 (or 93597 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 47.

The square root of 2780385428 is about 52729.3602085214. The cubic root of 2780385428 is about 1406.1608467384.

The spelling of 2780385428 in words is "two billion, seven hundred eighty million, three hundred eighty-five thousand, four hundred twenty-eight".