28640592 has 60 divisors (see below), whose sum is σ = 80973984. Its totient is φ = 9449280.

The previous prime is 28640587. The next prime is 28640609. The reversal of 28640592 is 29504682.

It is a happy number.

28640592 is a `hidden beast` number, since 2 + 8 + 64 + 0 + 592 = 666.

It is a super-2 number, since 2×28640592² = 1640567020220928, which contains 22 as substring.

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, 13867 + ... + 15797.

Almost surely, 2^28640592 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 28640592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40486992).

28640592 is an abundant number, since it is smaller than the sum of its proper divisors (52333392).

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

28640592 is a wasteful number, since it uses less digits than its factorization.

28640592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048 (or 2039 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 28640592 is about 5351.6905740149. The cubic root of 28640592 is about 305.9571899613.

The spelling of 28640592 in words is "twenty-eight million, six hundred forty thousand, five hundred ninety-two".