2778303280 has 40 divisors (see below), whose sum is σ = 6470974224. Its totient is φ = 1109356800.

The previous prime is 2778303263. The next prime is 2778303287. The reversal of 2778303280 is 823038772.

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

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (2778303287) 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, 15270 + ... + 76090.

Almost surely, 2^2778303280 is an apocalyptic number.

2778303280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2778303280 is an abundant number, since it is smaller than the sum of its proper divisors (3692670944).

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

2778303280 is a wasteful number, since it uses less digits than its factorization.

2778303280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61405 (or 61399 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 2778303280 is about 52709.6127855252. The cubic root of 2778303280 is about 1405.8097483948.

The spelling of 2778303280 in words is "two billion, seven hundred seventy-eight million, three hundred three thousand, two hundred eighty".