28741477 has 4 divisors (see below), whose sum is σ = 28763020. Its totient is φ = 28719936.

The previous prime is 28741417. The next prime is 28741481. The reversal of 28741477 is 77414782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77414782 = 2 ⋅38707391.

It can be written as a sum of positive squares in 2 ways, for example, as 1846881 + 26894596 = 1359^2 + 5186^2 .

It is a cyclic number.

It is not a de Polignac number, because 28741477 - 2¹¹ = 28739429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28741417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8628 + ... + 11485.

It is an arithmetic number, because the mean of its divisors is an integer number (7190755).

Almost surely, 2^28741477 is an apocalyptic number.

It is an amenable number.

28741477 is a deficient number, since it is larger than the sum of its proper divisors (21543).

28741477 is a wasteful number, since it uses less digits than its factorization.

28741477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21542.

The product of its digits is 87808, while the sum is 40.

The square root of 28741477 is about 5361.1078146219. The cubic root of 28741477 is about 306.3160084289.

The spelling of 28741477 in words is "twenty-eight million, seven hundred forty-one thousand, four hundred seventy-seven".