28707475 has 12 divisors (see below), whose sum is σ = 37691784. Its totient is φ = 21614720.

The previous prime is 28707463. The next prime is 28707487. The reversal of 28707475 is 57470782.

It is an interprime number because it is at equal distance from previous prime (28707463) and next prime (28707487).

It is not a de Polignac number, because 28707475 - 2⁵ = 28707443 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33349 + ... + 34198.

It is an arithmetic number, because the mean of its divisors is an integer number (3140982).

Almost surely, 2^28707475 is an apocalyptic number.

28707475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28707475 is a deficient number, since it is larger than the sum of its proper divisors (8984309).

28707475 is a wasteful number, since it uses less digits than its factorization.

28707475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67574 (or 67569 counting only the distinct ones).

The product of its (nonzero) digits is 109760, while the sum is 40.

The square root of 28707475 is about 5357.9357032350. The cubic root of 28707475 is about 306.1951671926.

The spelling of 28707475 in words is "twenty-eight million, seven hundred seven thousand, four hundred seventy-five".