28942732 has 72 divisors (see below), whose sum is σ = 65378544. Its totient is φ = 11104128.

The previous prime is 28942729. The next prime is 28942777. The reversal of 28942732 is 23724982.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 28942691 and 28942700.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94123 + ... + 94429.

Almost surely, 2^28942732 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 28942732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32689272).

28942732 is an abundant number, since it is smaller than the sum of its proper divisors (36435812).

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

28942732 is a wasteful number, since it uses less digits than its factorization.

28942732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375 (or 366 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 28942732 is about 5379.8449791792. The cubic root of 28942732 is about 307.0293131619.

The spelling of 28942732 in words is "twenty-eight million, nine hundred forty-two thousand, seven hundred thirty-two".