28149629472 has 72 divisors (see below), whose sum is σ = 80121000960. Its totient is φ = 9374947200.

The previous prime is 28149629467. The next prime is 28149629477. The reversal of 28149629472 is 27492694182.

It is a happy number.

28149629472 is a `hidden beast` number, since 2 + 8 + 1 + 4 + 9 + 629 + 4 + 7 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (28149629467) and next prime (28149629477).

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (28149629477) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 289029 + ... + 373947.

It is an arithmetic number, because the mean of its divisors is an integer number (1112791680).

Almost surely, 2^28149629472 is an apocalyptic number.

It is an amenable number.

28149629472 is an abundant number, since it is smaller than the sum of its proper divisors (51971371488).

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

28149629472 is a wasteful number, since it uses less digits than its factorization.

28149629472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86086 (or 86075 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The spelling of 28149629472 in words is "twenty-eight billion, one hundred forty-nine million, six hundred twenty-nine thousand, four hundred seventy-two".