28501473 has 32 divisors (see below), whose sum is σ = 51028992. Its totient is φ = 13665600.

The previous prime is 28501427. The next prime is 28501511. The reversal of 28501473 is 37410582.

It is not a de Polignac number, because 28501473 - 2⁶ = 28501409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28501473.

It is not an unprimeable number, because it can be changed into a prime (28501423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1743 + ... + 7748.

It is an arithmetic number, because the mean of its divisors is an integer number (1594656).

Almost surely, 2^28501473 is an apocalyptic number.

It is an amenable number.

28501473 is a deficient number, since it is larger than the sum of its proper divisors (22527519).

28501473 is a wasteful number, since it uses less digits than its factorization.

28501473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9525.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 28501473 is about 5338.6770833232. The cubic root of 28501473 is about 305.4609995367.

It can be divided in two parts, 28 and 501473, that added together give a triangular number (501501 = T₁₀₀₁).

The spelling of 28501473 in words is "twenty-eight million, five hundred one thousand, four hundred seventy-three".