27851242428 has 36 divisors (see below), whose sum is σ = 70545180888. Its totient is φ = 9264833760.

The previous prime is 27851242421. The next prime is 27851242499. The reversal of 27851242428 is 82424215872.

27851242428 is a `hidden beast` number, since 2 + 78 + 512 + 42 + 4 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27851242421) 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, 770151 + ... + 805502.

It is an arithmetic number, because the mean of its divisors is an integer number (1959588358).

Almost surely, 2^27851242428 is an apocalyptic number.

It is an amenable number.

27851242428 is an abundant number, since it is smaller than the sum of its proper divisors (42693938460).

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

27851242428 is a wasteful number, since it uses less digits than its factorization.

27851242428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576154 (or 1576149 counting only the distinct ones).

The product of its digits is 573440, while the sum is 45.

The spelling of 27851242428 in words is "twenty-seven billion, eight hundred fifty-one million, two hundred forty-two thousand, four hundred twenty-eight".