28161296 has 10 divisors (see below), whose sum is σ = 54562542. Its totient is φ = 14080640.

The previous prime is 28161277. The next prime is 28161313. The reversal of 28161296 is 69216182.

It can be written as a sum of positive squares in only one way, i.e., 22090000 + 6071296 = 4700^2 + 2464^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 880025 + ... + 880056.

Almost surely, 2^28161296 is an apocalyptic number.

It is an amenable number.

28161296 is a deficient number, since it is larger than the sum of its proper divisors (26401246).

28161296 is a wasteful number, since it uses less digits than its factorization.

28161296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760089 (or 1760083 counting only the distinct ones).

The product of its digits is 10368, while the sum is 35.

The square root of 28161296 is about 5306.7217752582. The cubic root of 28161296 is about 304.2408640492.

The spelling of 28161296 in words is "twenty-eight million, one hundred sixty-one thousand, two hundred ninety-six".