28553742 has 32 divisors (see below), whose sum is σ = 72518400. Its totient is φ = 8158104.

The previous prime is 28553737. The next prime is 28553773. The reversal of 28553742 is 24735582.

28553742 is a `hidden beast` number, since 2 + 85 + 537 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 28553697 and 28553706.

It is a congruent number.

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, 37392 + ... + 38147.

It is an arithmetic number, because the mean of its divisors is an integer number (2266200).

Almost surely, 2^28553742 is an apocalyptic number.

28553742 is an abundant number, since it is smaller than the sum of its proper divisors (43964658).

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

28553742 is a wasteful number, since it uses less digits than its factorization.

28553742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75557 (or 75551 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 28553742 is about 5343.5701548684. The cubic root of 28553742 is about 305.6476143453.

The spelling of 28553742 in words is "twenty-eight million, five hundred fifty-three thousand, seven hundred forty-two".