2778924280 has 32 divisors (see below), whose sum is σ = 6820997040. Its totient is φ = 1010517760.

The previous prime is 2778924277. The next prime is 2778924283. The reversal of 2778924280 is 824298772.

It is an interprime number because it is at equal distance from previous prime (2778924277) and next prime (2778924283).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778924283) 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, 3157429 + ... + 3158308.

Almost surely, 2^2778924280 is an apocalyptic number.

2778924280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2778924280 is an abundant number, since it is smaller than the sum of its proper divisors (4042072760).

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

2778924280 is a wasteful number, since it uses less digits than its factorization.

2778924280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6315759 (or 6315755 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 49.

The square root of 2778924280 is about 52715.5032224866. The cubic root of 2778924280 is about 1405.9144817194.

The spelling of 2778924280 in words is "two billion, seven hundred seventy-eight million, nine hundred twenty-four thousand, two hundred eighty".