28070587 has 4 divisors (see below), whose sum is σ = 29721816. Its totient is φ = 26419360.

The previous prime is 28070563. The next prime is 28070597. The reversal of 28070587 is 78507082.

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

It is not a de Polignac number, because 28070587 - 2⁷ = 28070459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28070597) 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, 825589 + ... + 825622.

It is an arithmetic number, because the mean of its divisors is an integer number (7430454).

Almost surely, 2^28070587 is an apocalyptic number.

28070587 is a deficient number, since it is larger than the sum of its proper divisors (1651229).

28070587 is a wasteful number, since it uses less digits than its factorization.

28070587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1651228.

The product of its (nonzero) digits is 31360, while the sum is 37.

The square root of 28070587 is about 5298.1682683735. The cubic root of 28070587 is about 303.9138541399.

The spelling of 28070587 in words is "twenty-eight million, seventy thousand, five hundred eighty-seven".