2198977776 has 120 divisors (see below), whose sum is σ = 6303468080. Its totient is φ = 715392000.

The previous prime is 2198977771. The next prime is 2198977793. The reversal of 2198977776 is 6777798912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2198977771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1220076 + ... + 1221876.

Almost surely, 2^2198977776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2198977776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3151734040).

2198977776 is an abundant number, since it is smaller than the sum of its proper divisors (4104490304).

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

2198977776 is a wasteful number, since it uses less digits than its factorization.

2198977776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2015 (or 2006 counting only the distinct ones).

The product of its digits is 18670176, while the sum is 63.

The square root of 2198977776 is about 46893.2593876775. The cubic root of 2198977776 is about 1300.3899768878.

It can be divided in two parts, 2198977 and 776, that added together give a triangular number (2199753 = T₂₀₉₇).

The spelling of 2198977776 in words is "two billion, one hundred ninety-eight million, nine hundred seventy-seven thousand, seven hundred seventy-six".