28349475 has 48 divisors (see below), whose sum is σ = 58448640. Its totient is φ = 11779200.

The previous prime is 28349471. The next prime is 28349479. The reversal of 28349475 is 57494382.

It is an interprime number because it is at equal distance from previous prime (28349471) and next prime (28349479).

It is not a de Polignac number, because 28349475 - 2² = 28349471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28349471) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3321 + ... + 8229.

It is an arithmetic number, because the mean of its divisors is an integer number (1217680).

Almost surely, 2^28349475 is an apocalyptic number.

28349475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28349475 is an abundant number, since it is smaller than the sum of its proper divisors (30099165).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28349475 is a wasteful number, since it uses less digits than its factorization.

28349475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4940 (or 4935 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 28349475 is about 5324.4225038965. The cubic root of 28349475 is about 304.9170248174.

The spelling of 28349475 in words is "twenty-eight million, three hundred forty-nine thousand, four hundred seventy-five".