28445377 has 8 divisors (see below), whose sum is σ = 28919520. Its totient is φ = 27975360.

The previous prime is 28445371. The next prime is 28445401. The reversal of 28445377 is 77354482.

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 28445377 - 2¹⁵ = 28412609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28445371) 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, 14802 + ... + 16612.

It is an arithmetic number, because the mean of its divisors is an integer number (3614940).

Almost surely, 2^28445377 is an apocalyptic number.

It is an amenable number.

28445377 is a deficient number, since it is larger than the sum of its proper divisors (474143).

28445377 is a wasteful number, since it uses less digits than its factorization.

28445377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2063.

The product of its digits is 188160, while the sum is 40.

The square root of 28445377 is about 5333.4207597001. The cubic root of 28445377 is about 305.2604672787.

The spelling of 28445377 in words is "twenty-eight million, four hundred forty-five thousand, three hundred seventy-seven".