27780025028 has 24 divisors (see below), whose sum is σ = 55569360000. Its totient is φ = 11903730048.

The previous prime is 27780025027. The next prime is 27780025033. The reversal of 27780025028 is 82052008772.

It is a happy number.

It is a super-4 number, since 4×27780025028⁴ (a number of 43 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (27780025027) 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, 93548 + ... + 253596.

It is an arithmetic number, because the mean of its divisors is an integer number (2315390000).

Almost surely, 2^27780025028 is an apocalyptic number.

27780025028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

27780025028 is an abundant number, since it is smaller than the sum of its proper divisors (27789334972).

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

27780025028 is a wasteful number, since it uses less digits than its factorization.

27780025028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166259 (or 166257 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 41.

The spelling of 27780025028 in words is "twenty-seven billion, seven hundred eighty million, twenty-five thousand, twenty-eight".