28958957 has 4 divisors (see below), whose sum is σ = 29433756. Its totient is φ = 28484160.

The previous prime is 28958953. The next prime is 28958977. The reversal of 28958957 is 75985982.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16924996 + 12033961 = 4114^2 + 3469^2 .

It is a cyclic number.

It is not a de Polignac number, because 28958957 - 2² = 28958953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28958899 and 28958908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28958953) 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, 237308 + ... + 237429.

It is an arithmetic number, because the mean of its divisors is an integer number (7358439).

Almost surely, 2^28958957 is an apocalyptic number.

It is an amenable number.

28958957 is a deficient number, since it is larger than the sum of its proper divisors (474799).

28958957 is an equidigital number, since it uses as much as digits as its factorization.

28958957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474798.

The product of its digits is 1814400, while the sum is 53.

The square root of 28958957 is about 5381.3527109826. The cubic root of 28958957 is about 307.0866749437.

The spelling of 28958957 in words is "twenty-eight million, nine hundred fifty-eight thousand, nine hundred fifty-seven".