28077732 has 48 divisors (see below), whose sum is σ = 73080000. Its totient is φ = 9322560.

The previous prime is 28077719. The next prime is 28077767. The reversal of 28077732 is 23777082.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53632 + ... + 54152.

It is an arithmetic number, because the mean of its divisors is an integer number (1522500).

Almost surely, 2^28077732 is an apocalyptic number.

It is an amenable number.

28077732 is an abundant number, since it is smaller than the sum of its proper divisors (45002268).

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

28077732 is a wasteful number, since it uses less digits than its factorization.

28077732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033 (or 1025 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

The square root of 28077732 is about 5298.8425151159. The cubic root of 28077732 is about 303.9396377152.

The spelling of 28077732 in words is "twenty-eight million, seventy-seven thousand, seven hundred thirty-two".