28752643426 has 32 divisors (see below), whose sum is σ = 47608638336. Its totient is φ = 12938832000.

The previous prime is 28752643391. The next prime is 28752643463. The reversal of 28752643426 is 62434625782.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28752643426.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1944481 + ... + 1959211.

It is an arithmetic number, because the mean of its divisors is an integer number (1487769948).

Almost surely, 2^28752643426 is an apocalyptic number.

28752643426 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28752643426 is a deficient number, since it is larger than the sum of its proper divisors (18855994910).

28752643426 is a wasteful number, since it uses less digits than its factorization.

28752643426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16618.

The product of its digits is 3870720, while the sum is 49.

The spelling of 28752643426 in words is "twenty-eight billion, seven hundred fifty-two million, six hundred forty-three thousand, four hundred twenty-six".