83878687838 has 16 divisors (see below), whose sum is σ = 139304634624. Its totient is φ = 37557620760.

The previous prime is 83878687819. The next prime is 83878687853.

It is a happy number.

83878687838 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×83878687838² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28451270 + ... + 28454217.

It is an arithmetic number, because the mean of its divisors is an integer number (8706539664).

Almost surely, 2^83878687838 is an apocalyptic number.

83878687838 is a deficient number, since it is larger than the sum of its proper divisors (55425946786).

83878687838 is a wasteful number, since it uses less digits than its factorization.

83878687838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56905567.

The product of its digits is 693633024, while the sum is 74.

The spelling of 83878687838 in words is "eighty-three billion, eight hundred seventy-eight million, six hundred eighty-seven thousand, eight hundred thirty-eight".