28354057 has 4 divisors (see below), whose sum is σ = 29268736. Its totient is φ = 27439380.

The previous prime is 28354021. The next prime is 28354069. The reversal of 28354057 is 75045382.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75045382 = 2 ⋅37522691.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28354057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28354087) 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, 457293 + ... + 457354.

It is an arithmetic number, because the mean of its divisors is an integer number (7317184).

Almost surely, 2^28354057 is an apocalyptic number.

It is an amenable number.

28354057 is a deficient number, since it is larger than the sum of its proper divisors (914679).

28354057 is an equidigital number, since it uses as much as digits as its factorization.

28354057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914678.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 28354057 is about 5324.8527679176. The cubic root of 28354057 is about 304.9334513949.

The spelling of 28354057 in words is "twenty-eight million, three hundred fifty-four thousand, fifty-seven".