28542021930 has 48 divisors (see below), whose sum is σ = 74775770784. Its totient is φ = 7553101920.

The previous prime is 28542021929. The next prime is 28542021931. The reversal of 28542021930 is 3912024582.

It is a happy number.

28542021930 is a `hidden beast` number, since 2 + 8 + 542 + 0 + 21 + 93 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (28542021929) and next prime (28542021931).

It is not an unprimeable number, because it can be changed into a prime (28542021931) 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 23 ways as a sum of consecutive naturals, for example, 1198644 + ... + 1222223.

It is an arithmetic number, because the mean of its divisors is an integer number (1557828558).

Almost surely, 2^28542021930 is an apocalyptic number.

28542021930 is an abundant number, since it is smaller than the sum of its proper divisors (46233748854).

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

28542021930 is a wasteful number, since it uses less digits than its factorization.

28542021930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2421011 (or 2421008 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 28542021930 in words is "twenty-eight billion, five hundred forty-two million, twenty-one thousand, nine hundred thirty".