28912351 has 6 divisors (see below), whose sum is σ = 31307640. Its totient is φ = 26688168.

The previous prime is 28912327. The next prime is 28912381. The reversal of 28912351 is 15321982.

It is a de Polignac number, because none of the positive numbers 2^k-28912351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28912321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85371 + ... + 85708.

It is an arithmetic number, because the mean of its divisors is an integer number (5217940).

Almost surely, 2^28912351 is an apocalyptic number.

28912351 is a deficient number, since it is larger than the sum of its proper divisors (2395289).

28912351 is a wasteful number, since it uses less digits than its factorization.

28912351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171105 (or 171092 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 28912351 is about 5377.0206434419. The cubic root of 28912351 is about 306.9218466511.

The spelling of 28912351 in words is "twenty-eight million, nine hundred twelve thousand, three hundred fifty-one".