28997350 has 12 divisors (see below), whose sum is σ = 53935164. Its totient is φ = 11598920.

The previous prime is 28997347. The next prime is 28997377. The reversal of 28997350 is 5379982.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28997297 and 28997306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 289924 + ... + 290023.

It is an arithmetic number, because the mean of its divisors is an integer number (4494597).

Almost surely, 2^28997350 is an apocalyptic number.

28997350 is a deficient number, since it is larger than the sum of its proper divisors (24937814).

28997350 is a wasteful number, since it uses less digits than its factorization.

28997350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579959 (or 579954 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 28997350 is about 5384.9187551903. The cubic root of 28997350 is about 307.2223240771. Note that the first 3 decimals are identical.

The spelling of 28997350 in words is "twenty-eight million, nine hundred ninety-seven thousand, three hundred fifty".