27157428 has 18 divisors (see below), whose sum is σ = 68648034. Its totient is φ = 9052464.

The previous prime is 27157423. The next prime is 27157439. The reversal of 27157428 is 82475172.

It can be written as a sum of positive squares in only one way, i.e., 26811684 + 345744 = 5178^2 + 588^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 754373 = 27157428 / (2 + 7 + 1 + 5 + 7 + 4 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 27157392 and 27157401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27157423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 377151 + ... + 377222.

Almost surely, 2^27157428 is an apocalyptic number.

It is an amenable number.

27157428 is an abundant number, since it is smaller than the sum of its proper divisors (41490606).

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

27157428 is a wasteful number, since it uses less digits than its factorization.

27157428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754383 (or 754378 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 27157428 is about 5211.2789217235. The cubic root of 27157428 is about 300.5819371008.

The spelling of 27157428 in words is "twenty-seven million, one hundred fifty-seven thousand, four hundred twenty-eight".