28577376 has 72 divisors (see below), whose sum is σ = 82535544. Its totient is φ = 9377280.

The previous prime is 28577333. The next prime is 28577377. The reversal of 28577376 is 67377582.

28577376 is a `hidden beast` number, since 2 + 8 + 577 + 3 + 76 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28577377) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18556 + ... + 20036.

It is an arithmetic number, because the mean of its divisors is an integer number (1146327).

Almost surely, 2^28577376 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 28577376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41267772).

28577376 is an abundant number, since it is smaller than the sum of its proper divisors (53958168).

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

28577376 is a wasteful number, since it uses less digits than its factorization.

28577376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564 (or 1553 counting only the distinct ones).

The product of its digits is 493920, while the sum is 45.

The square root of 28577376 is about 5345.7811403012. The cubic root of 28577376 is about 305.7319195082.

The spelling of 28577376 in words is "twenty-eight million, five hundred seventy-seven thousand, three hundred seventy-six".