28957397 has 8 divisors (see below), whose sum is σ = 33355776. Its totient is φ = 24624432.

The previous prime is 28957373. The next prime is 28957403. The reversal of 28957397 is 79375982.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28957397 - 2¹⁶ = 28891861 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 (28957337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15398 + ... + 17175.

It is an arithmetic number, because the mean of its divisors is an integer number (4169472).

Almost surely, 2^28957397 is an apocalyptic number.

It is an amenable number.

28957397 is a deficient number, since it is larger than the sum of its proper divisors (4398379).

28957397 is a wasteful number, since it uses less digits than its factorization.

28957397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32707.

The product of its digits is 952560, while the sum is 50.

The square root of 28957397 is about 5381.2077640619. The cubic root of 28957397 is about 307.0811606588.

The spelling of 28957397 in words is "twenty-eight million, nine hundred fifty-seven thousand, three hundred ninety-seven".