1238979828 has 12 divisors (see below), whose sum is σ = 2890952960. Its totient is φ = 412993272.

The previous prime is 1238979803. The next prime is 1238979829. The reversal of 1238979828 is 8289798321.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238979829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51624148 + ... + 51624171.

Almost surely, 2^1238979828 is an apocalyptic number.

It is an amenable number.

1238979828 is an abundant number, since it is smaller than the sum of its proper divisors (1651973132).

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

1238979828 is a wasteful number, since it uses less digits than its factorization.

1238979828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103248326 (or 103248324 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 57.

The square root of 1238979828 is about 35199.1452737137. The cubic root of 1238979828 is about 1074.0423641865.

The spelling of 1238979828 in words is "one billion, two hundred thirty-eight million, nine hundred seventy-nine thousand, eight hundred twenty-eight".