28624501 has 4 divisors (see below), whose sum is σ = 29547904. Its totient is φ = 27701100.

The previous prime is 28624493. The next prime is 28624513. The reversal of 28624501 is 10542682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28624501 - 2³ = 28624493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28624501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28624591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461655 + ... + 461716.

It is an arithmetic number, because the mean of its divisors is an integer number (7386976).

Almost surely, 2^28624501 is an apocalyptic number.

It is an amenable number.

28624501 is a deficient number, since it is larger than the sum of its proper divisors (923403).

28624501 is an equidigital number, since it uses as much as digits as its factorization.

28624501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923402.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 28624501 is about 5350.1870060775. The cubic root of 28624501 is about 305.8998810969.

The spelling of 28624501 in words is "twenty-eight million, six hundred twenty-four thousand, five hundred one".