2102698638 has 12 divisors (see below), whose sum is σ = 4555847088. Its totient is φ = 700899540.

The previous prime is 2102698589. The next prime is 2102698639. The reversal of 2102698638 is 8368962012.

2102698638 is a `hidden beast` number, since 2 + 1 + 0 + 2 + 6 + 9 + 8 + 638 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2102698593 and 2102698602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102698639) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58408278 + ... + 58408313.

It is an arithmetic number, because the mean of its divisors is an integer number (379653924).

Almost surely, 2^2102698638 is an apocalyptic number.

2102698638 is an abundant number, since it is smaller than the sum of its proper divisors (2453148450).

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

2102698638 is a wasteful number, since it uses less digits than its factorization.

2102698638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116816599 (or 116816596 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 2102698638 is about 45855.1920506282. The cubic root of 2102698638 is about 1281.1274729770.

The spelling of 2102698638 in words is "two billion, one hundred two million, six hundred ninety-eight thousand, six hundred thirty-eight".