2821087838 has 4 divisors (see below), whose sum is σ = 4231631760. Its totient is φ = 1410543918.

The previous prime is 2821087837. The next prime is 2821087853. The reversal of 2821087838 is 8387801282.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 2821087792 and 2821087801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2821087837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 705271958 + ... + 705271961.

It is an arithmetic number, because the mean of its divisors is an integer number (1057907940).

Almost surely, 2^2821087838 is an apocalyptic number.

2821087838 is a deficient number, since it is larger than the sum of its proper divisors (1410543922).

2821087838 is a wasteful number, since it uses less digits than its factorization.

2821087838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410543921.

The product of its (nonzero) digits is 344064, while the sum is 47.

The square root of 2821087838 is about 53113.9137891382. The cubic root of 2821087838 is about 1412.9892883765.

The spelling of 2821087838 in words is "two billion, eight hundred twenty-one million, eighty-seven thousand, eight hundred thirty-eight".