28670147 has 4 divisors (see below), whose sum is σ = 31276536. Its totient is φ = 26063760.

The previous prime is 28670101. The next prime is 28670179. The reversal of 28670147 is 74107682.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28670147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28670197) 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, 1303178 + ... + 1303199.

It is an arithmetic number, because the mean of its divisors is an integer number (7819134).

Almost surely, 2^28670147 is an apocalyptic number.

28670147 is a deficient number, since it is larger than the sum of its proper divisors (2606389).

28670147 is a wasteful number, since it uses less digits than its factorization.

28670147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2606388.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 28670147 is about 5354.4511390058. The cubic root of 28670147 is about 306.0623956092.

The spelling of 28670147 in words is "twenty-eight million, six hundred seventy thousand, one hundred forty-seven".