28201534 has 4 divisors (see below), whose sum is σ = 42302304. Its totient is φ = 14100766.

The previous prime is 28201517. The next prime is 28201553. The reversal of 28201534 is 43510282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43510282 = 2 ⋅21755141.

It is a junction number, because it is equal to n+sod(n) for n = 28201499 and 28201508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7050382 + ... + 7050385.

It is an arithmetic number, because the mean of its divisors is an integer number (10575576).

Almost surely, 2^28201534 is an apocalyptic number.

28201534 is a deficient number, since it is larger than the sum of its proper divisors (14100770).

28201534 is a wasteful number, since it uses less digits than its factorization.

28201534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14100769.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 28201534 is about 5310.5116514325. The cubic root of 28201534 is about 304.3856989775.

The spelling of 28201534 in words is "twenty-eight million, two hundred one thousand, five hundred thirty-four".