28438699142 has 32 divisors (see below), whose sum is σ = 50476504320. Its totient is φ = 11757624480.

The previous prime is 28438699139. The next prime is 28438699181. The reversal of 28438699142 is 24199683482.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 452417 + ... + 511427.

It is an arithmetic number, because the mean of its divisors is an integer number (1577390760).

Almost surely, 2^28438699142 is an apocalyptic number.

28438699142 is a deficient number, since it is larger than the sum of its proper divisors (22037805178).

28438699142 is a wasteful number, since it uses less digits than its factorization.

28438699142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60236.

The product of its digits is 5971968, while the sum is 56.

The spelling of 28438699142 in words is "twenty-eight billion, four hundred thirty-eight million, six hundred ninety-nine thousand, one hundred forty-two".