28947492 has 72 divisors (see below), whose sum is σ = 84121856. Its totient is φ = 8221824.

The previous prime is 28947461. The next prime is 28947497. The reversal of 28947492 is 29474982.

It is not an unprimeable number, because it can be changed into a prime (28947497) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78693 + ... + 79059.

Almost surely, 2^28947492 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 28947492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42060928).

28947492 is an abundant number, since it is smaller than the sum of its proper divisors (55174364).

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

28947492 is a wasteful number, since it uses less digits than its factorization.

28947492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697 (or 692 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 28947492 is about 5380.2873529208. The cubic root of 28947492 is about 307.0461438631.

The spelling of 28947492 in words is "twenty-eight million, nine hundred forty-seven thousand, four hundred ninety-two".