28472123988 has 72 divisors (see below), whose sum is σ = 89730338880. Its totient is φ = 7395356160.

The previous prime is 28472123983. The next prime is 28472123989. The reversal of 28472123988 is 88932127482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28472123983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5132893 + ... + 5138436.

Almost surely, 2^28472123988 is an apocalyptic number.

28472123988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28472123988 is an abundant number, since it is smaller than the sum of its proper divisors (61258214892).

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

28472123988 is a wasteful number, since it uses less digits than its factorization.

28472123988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10271357 (or 10271352 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The spelling of 28472123988 in words is "twenty-eight billion, four hundred seventy-two million, one hundred twenty-three thousand, nine hundred eighty-eight".