28572242399 has 4 divisors (see below), whose sum is σ = 28638229536. Its totient is φ = 28506255264.

The previous prime is 28572242357. The next prime is 28572242411. The reversal of 28572242399 is 99324227582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28572242399 - 2⁸ = 28572242143 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 28572242399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28572242599) 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, 32992919 + ... + 32993784.

It is an arithmetic number, because the mean of its divisors is an integer number (7159557384).

Almost surely, 2^28572242399 is an apocalyptic number.

28572242399 is a deficient number, since it is larger than the sum of its proper divisors (65987137).

28572242399 is an equidigital number, since it uses as much as digits as its factorization.

28572242399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65987136.

The product of its digits is 4354560, while the sum is 53.

The spelling of 28572242399 in words is "twenty-eight billion, five hundred seventy-two million, two hundred forty-two thousand, three hundred ninety-nine".