28406351 has 4 divisors (see below), whose sum is σ = 28687704. Its totient is φ = 28125000.

The previous prime is 28406347. The next prime is 28406369. The reversal of 28406351 is 15360482.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28406351 - 2² = 28406347 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 (28406551) 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, 140525 + ... + 140726.

It is an arithmetic number, because the mean of its divisors is an integer number (7171926).

Almost surely, 2^28406351 is an apocalyptic number.

28406351 is a deficient number, since it is larger than the sum of its proper divisors (281353).

28406351 is a wasteful number, since it uses less digits than its factorization.

28406351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281352.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 28406351 is about 5329.7608764371. The cubic root of 28406351 is about 305.1208013819.

The spelling of 28406351 in words is "twenty-eight million, four hundred six thousand, three hundred fifty-one".