28722909642 has 16 divisors (see below), whose sum is σ = 65652364992. Its totient is φ = 8206545600.

The previous prime is 28722909619. The next prime is 28722909647. The reversal of 28722909642 is 24690922782.

It is not an unprimeable number, because it can be changed into a prime (28722909647) 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, 341939359 + ... + 341939442.

It is an arithmetic number, because the mean of its divisors is an integer number (4103272812).

Almost surely, 2^28722909642 is an apocalyptic number.

28722909642 is an abundant number, since it is smaller than the sum of its proper divisors (36929455350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28722909642 is a wasteful number, since it uses less digits than its factorization.

28722909642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683878813.

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 28722909642 in words is "twenty-eight billion, seven hundred twenty-two million, nine hundred nine thousand, six hundred forty-two".