28471536 has 60 divisors (see below), whose sum is σ = 80235688. Its totient is φ = 9424512.

The previous prime is 28471529. The next prime is 28471543. The reversal of 28471536 is 63517482.

It is an interprime number because it is at equal distance from previous prime (28471529) and next prime (28471543).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28471536.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22866 + ... + 24078.

Almost surely, 2^28471536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28471536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40117844).

28471536 is an abundant number, since it is smaller than the sum of its proper divisors (51764152).

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

28471536 is a wasteful number, since it uses less digits than its factorization.

28471536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390 (or 1381 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 28471536 is about 5335.8725621964. The cubic root of 28471536 is about 305.3540133757.

The spelling of 28471536 in words is "twenty-eight million, four hundred seventy-one thousand, five hundred thirty-six".