2798778972 has 48 divisors (see below), whose sum is σ = 7127616384. Its totient is φ = 847704000.

The previous prime is 2798778971. The next prime is 2798778973.

2798778972 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (2798778971) and next prime (2798778973).

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2798778971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 373947 + ... + 381357.

It is an arithmetic number, because the mean of its divisors is an integer number (148492008).

Almost surely, 2^2798778972 is an apocalyptic number.

2798778972 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2798778972 is an abundant number, since it is smaller than the sum of its proper divisors (4328837412).

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

2798778972 is a wasteful number, since it uses less digits than its factorization.

2798778972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10290 (or 10288 counting only the distinct ones).

The product of its digits is 49787136, while the sum is 66.

The square root of 2798778972 is about 52903.4873330672. The cubic root of 2798778972 is about 1409.2548368844.

The spelling of 2798778972 in words is "two billion, seven hundred ninety-eight million, seven hundred seventy-eight thousand, nine hundred seventy-two".