28390351 has 24 divisors (see below), whose sum is σ = 33611760. Its totient is φ = 23886720.

The previous prime is 28390343. The next prime is 28390361. The reversal of 28390351 is 15309382.

It is a happy number.

It is not a de Polignac number, because 28390351 - 2³ = 28390343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28390301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121731 + ... + 121963.

It is an arithmetic number, because the mean of its divisors is an integer number (1400490).

Almost surely, 2^28390351 is an apocalyptic number.

28390351 is a deficient number, since it is larger than the sum of its proper divisors (5221409).

28390351 is a wasteful number, since it uses less digits than its factorization.

28390351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 28390351 is about 5328.2596595887. The cubic root of 28390351 is about 305.0635037528.

The spelling of 28390351 in words is "twenty-eight million, three hundred ninety thousand, three hundred fifty-one".