28097272 has 32 divisors (see below), whose sum is σ = 60566400. Its totient is φ = 11970144.

The previous prime is 28097233. The next prime is 28097287. The reversal of 28097272 is 27279082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8623 + ... + 11425.

It is an arithmetic number, because the mean of its divisors is an integer number (1892700).

Almost surely, 2^28097272 is an apocalyptic number.

It is an amenable number.

28097272 is an abundant number, since it is smaller than the sum of its proper divisors (32469128).

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

28097272 is a wasteful number, since it uses less digits than its factorization.

28097272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2995 (or 2991 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 28097272 is about 5300.6859933409. The cubic root of 28097272 is about 304.0101277789.

The spelling of 28097272 in words is "twenty-eight million, ninety-seven thousand, two hundred seventy-two".