28772533401 has 16 divisors (see below), whose sum is σ = 38421197760. Its totient is φ = 19152806400.

The previous prime is 28772533351. The next prime is 28772533403. The reversal of 28772533401 is 10433527782.

It is a happy number.

It is not a de Polignac number, because 28772533401 - 2¹¹ = 28772531353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28772533403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8151405 + ... + 8154933.

It is an arithmetic number, because the mean of its divisors is an integer number (2401324860).

Almost surely, 2^28772533401 is an apocalyptic number.

It is an amenable number.

28772533401 is a deficient number, since it is larger than the sum of its proper divisors (9648664359).

28772533401 is a wasteful number, since it uses less digits than its factorization.

28772533401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6856.

The product of its (nonzero) digits is 282240, while the sum is 42.

The spelling of 28772533401 in words is "twenty-eight billion, seven hundred seventy-two million, five hundred thirty-three thousand, four hundred one".