28621177 has 8 divisors (see below), whose sum is σ = 32163264. Its totient is φ = 25270608.

The previous prime is 28621171. The next prime is 28621193. The reversal of 28621177 is 77112682.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28621177 - 2³ = 28621169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28621171) 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, 47563 + ... + 48160.

It is an arithmetic number, because the mean of its divisors is an integer number (4020408).

Almost surely, 2^28621177 is an apocalyptic number.

It is an amenable number.

28621177 is a deficient number, since it is larger than the sum of its proper divisors (3542087).

28621177 is a wasteful number, since it uses less digits than its factorization.

28621177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95759.

The product of its digits is 9408, while the sum is 34.

The square root of 28621177 is about 5349.8763537114. The cubic root of 28621177 is about 305.8880398358. Note that the first 3 decimals are identical.

The spelling of 28621177 in words is "twenty-eight million, six hundred twenty-one thousand, one hundred seventy-seven".