28910477 has 8 divisors (see below), whose sum is σ = 30270240. Its totient is φ = 27574960.

The previous prime is 28910473. The next prime is 28910501. The reversal of 28910477 is 77401982.

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 28910477 - 2² = 28910473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28910477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28910473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3599 + ... + 8412.

It is an arithmetic number, because the mean of its divisors is an integer number (3783780).

Almost surely, 2^28910477 is an apocalyptic number.

It is an amenable number.

28910477 is a deficient number, since it is larger than the sum of its proper divisors (1359763).

28910477 is a wasteful number, since it uses less digits than its factorization.

28910477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12123.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 28910477 is about 5376.8463805469. The cubic root of 28910477 is about 306.9152152987.

The spelling of 28910477 in words is "twenty-eight million, nine hundred ten thousand, four hundred seventy-seven".