28945761 has 8 divisors (see below), whose sum is σ = 41563200. Its totient is φ = 17812752.

The previous prime is 28945757. The next prime is 28945789. The reversal of 28945761 is 16754982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28945761 - 2² = 28945757 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28945061) 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, 371061 + ... + 371138.

It is an arithmetic number, because the mean of its divisors is an integer number (5195400).

Almost surely, 2^28945761 is an apocalyptic number.

It is an amenable number.

28945761 is a deficient number, since it is larger than the sum of its proper divisors (12617439).

28945761 is a wasteful number, since it uses less digits than its factorization.

28945761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742215.

The product of its digits is 120960, while the sum is 42.

The square root of 28945761 is about 5380.1264855020. The cubic root of 28945761 is about 307.0400235002.

The spelling of 28945761 in words is "twenty-eight million, nine hundred forty-five thousand, seven hundred sixty-one".