28781262148 has 12 divisors (see below), whose sum is σ = 50368952592. Its totient is φ = 14390132840.

The previous prime is 28781262071. The next prime is 28781262151. The reversal of 28781262148 is 84126218782.

It is a super-2 number, since 2×28781262148² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25503 + ... + 241273.

It is an arithmetic number, because the mean of its divisors is an integer number (4197412716).

Almost surely, 2^28781262148 is an apocalyptic number.

It is an amenable number.

28781262148 is a deficient number, since it is larger than the sum of its proper divisors (21587690444).

28781262148 is a wasteful number, since it uses less digits than its factorization.

28781262148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249122 (or 249120 counting only the distinct ones).

The product of its digits is 688128, while the sum is 49.

The spelling of 28781262148 in words is "twenty-eight billion, seven hundred eighty-one million, two hundred sixty-two thousand, one hundred forty-eight".