28628732 has 24 divisors (see below), whose sum is σ = 54985392. Its totient is φ = 12934400.

The previous prime is 28628729. The next prime is 28628749. The reversal of 28628732 is 23782682.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5732 + ... + 9492.

It is an arithmetic number, because the mean of its divisors is an integer number (2291058).

Almost surely, 2^28628732 is an apocalyptic number.

28628732 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28628732 is a deficient number, since it is larger than the sum of its proper divisors (26356660).

28628732 is a wasteful number, since it uses less digits than its factorization.

28628732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3949 (or 3947 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 28628732 is about 5350.5823982068. The cubic root of 28628732 is about 305.9149520860.

The spelling of 28628732 in words is "twenty-eight million, six hundred twenty-eight thousand, seven hundred thirty-two".