28006148 has 6 divisors (see below), whose sum is σ = 49010766. Its totient is φ = 14003072.

The previous prime is 28006129. The next prime is 28006159. The reversal of 28006148 is 84160082.

It can be written as a sum of positive squares in only one way, i.e., 16662724 + 11343424 = 4082^2 + 3368^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28006148.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3500765 + ... + 3500772.

It is an arithmetic number, because the mean of its divisors is an integer number (8168461).

Almost surely, 2^28006148 is an apocalyptic number.

It is an amenable number.

28006148 is a deficient number, since it is larger than the sum of its proper divisors (21004618).

28006148 is a wasteful number, since it uses less digits than its factorization.

28006148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7001541 (or 7001539 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 28006148 is about 5292.0835216387. The cubic root of 28006148 is about 303.6811205004.

The spelling of 28006148 in words is "twenty-eight million, six thousand, one hundred forty-eight".