28572917 has 16 divisors (see below), whose sum is σ = 31372800. Its totient is φ = 25945920.

The previous prime is 28572893. The next prime is 28572953. The reversal of 28572917 is 71927582.

It is a cyclic number.

It is not a de Polignac number, because 28572917 - 2¹² = 28568821 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 (28572967) 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, 32834 + ... + 33692.

It is an arithmetic number, because the mean of its divisors is an integer number (1960800).

Almost surely, 2^28572917 is an apocalyptic number.

It is an amenable number.

28572917 is a deficient number, since it is larger than the sum of its proper divisors (2799883).

28572917 is a wasteful number, since it uses less digits than its factorization.

28572917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956.

The product of its digits is 70560, while the sum is 41.

The square root of 28572917 is about 5345.3640661792. The cubic root of 28572917 is about 305.7160173072.

The spelling of 28572917 in words is "twenty-eight million, five hundred seventy-two thousand, nine hundred seventeen".