28661635 has 8 divisors (see below), whose sum is σ = 34878816. Its totient is φ = 22606080.

The previous prime is 28661629. The next prime is 28661641. The reversal of 28661635 is 53616682.

It is an interprime number because it is at equal distance from previous prime (28661629) and next prime (28661641).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28661635 - 2³ = 28661627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28661594 and 28661603.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40014 + ... + 40723.

It is an arithmetic number, because the mean of its divisors is an integer number (4359852).

Almost surely, 2^28661635 is an apocalyptic number.

28661635 is a deficient number, since it is larger than the sum of its proper divisors (6217181).

28661635 is an equidigital number, since it uses as much as digits as its factorization.

28661635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80813.

The product of its digits is 51840, while the sum is 37.

The square root of 28661635 is about 5353.6562272899. The cubic root of 28661635 is about 306.0321032290.

The spelling of 28661635 in words is "twenty-eight million, six hundred sixty-one thousand, six hundred thirty-five".