28651550 has 12 divisors (see below), whose sum is σ = 53291976. Its totient is φ = 11460600.

The previous prime is 28651549. The next prime is 28651561. The reversal of 28651550 is 5515682.

It is a super-2 number, since 2×28651550² = 1641822634805000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 286466 + ... + 286565.

It is an arithmetic number, because the mean of its divisors is an integer number (4440998).

Almost surely, 2^28651550 is an apocalyptic number.

28651550 is a deficient number, since it is larger than the sum of its proper divisors (24640426).

28651550 is a wasteful number, since it uses less digits than its factorization.

28651550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573043 (or 573038 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 28651550 is about 5352.7142647446. The cubic root of 28651550 is about 305.9962051162.

The spelling of 28651550 in words is "twenty-eight million, six hundred fifty-one thousand, five hundred fifty".