28661477 has 16 divisors (see below), whose sum is σ = 31667328. Its totient is φ = 25780800.

The previous prime is 28661459. The next prime is 28661489. The reversal of 28661477 is 77416682.

It is a cyclic number.

It is not a de Polignac number, because 28661477 - 2⁸ = 28661221 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 (28661447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108848 + ... + 109110.

It is an arithmetic number, because the mean of its divisors is an integer number (1979208).

Almost surely, 2^28661477 is an apocalyptic number.

It is an amenable number.

28661477 is a deficient number, since it is larger than the sum of its proper divisors (3005851).

28661477 is a wasteful number, since it uses less digits than its factorization.

28661477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460.

The product of its digits is 112896, while the sum is 41.

The square root of 28661477 is about 5353.6414709990. The cubic root of 28661477 is about 306.0315408843.

The spelling of 28661477 in words is "twenty-eight million, six hundred sixty-one thousand, four hundred seventy-seven".