28077552 has 60 divisors (see below), whose sum is σ = 79684384. Its totient is φ = 9227520.

The previous prime is 28077547. The next prime is 28077563. The reversal of 28077552 is 25577082.

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

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, 9177 + ... + 11847.

Almost surely, 2^28077552 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 28077552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39842192).

28077552 is an abundant number, since it is smaller than the sum of its proper divisors (51606832).

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

28077552 is a wasteful number, since it uses less digits than its factorization.

28077552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2758 (or 2749 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 28077552 is about 5298.8255302472. The cubic root of 28077552 is about 303.9389882176.

The spelling of 28077552 in words is "twenty-eight million, seventy-seven thousand, five hundred fifty-two".