28577156 has 6 divisors (see below), whose sum is σ = 50010030. Its totient is φ = 14288576.

The previous prime is 28577147. The next prime is 28577161. The reversal of 28577156 is 65177582.

It can be written as a sum of positive squares in only one way, i.e., 27730756 + 846400 = 5266^2 + 920^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3572141 + ... + 3572148.

It is an arithmetic number, because the mean of its divisors is an integer number (8335005).

Almost surely, 2^28577156 is an apocalyptic number.

It is an amenable number.

28577156 is a deficient number, since it is larger than the sum of its proper divisors (21432874).

28577156 is a wasteful number, since it uses less digits than its factorization.

28577156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7144293 (or 7144291 counting only the distinct ones).

The product of its digits is 117600, while the sum is 41.

The square root of 28577156 is about 5345.7605632875. The cubic root of 28577156 is about 305.7311349576.

The spelling of 28577156 in words is "twenty-eight million, five hundred seventy-seven thousand, one hundred fifty-six".