28351623 has 8 divisors (see below), whose sum is σ = 38724336. Its totient is φ = 18440000.

The previous prime is 28351621. The next prime is 28351627. The reversal of 28351623 is 32615382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28351623 - 2¹ = 28351621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28351621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115128 + ... + 115373.

It is an arithmetic number, because the mean of its divisors is an integer number (4840542).

Almost surely, 2^28351623 is an apocalyptic number.

28351623 is a deficient number, since it is larger than the sum of its proper divisors (10372713).

28351623 is a wasteful number, since it uses less digits than its factorization.

28351623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230545.

The product of its digits is 8640, while the sum is 30.

The square root of 28351623 is about 5324.6242120923. The cubic root of 28351623 is about 304.9247256681.

The spelling of 28351623 in words is "twenty-eight million, three hundred fifty-one thousand, six hundred twenty-three".