28408951 has 8 divisors (see below), whose sum is σ = 29452320. Its totient is φ = 27369888.

The previous prime is 28408943. The next prime is 28408957. The reversal of 28408951 is 15980482.

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

It is a cyclic number.

It is not a de Polignac number, because 28408951 - 2³ = 28408943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28408951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28408957) 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, 18910 + ... + 20356.

It is an arithmetic number, because the mean of its divisors is an integer number (3681540).

Almost surely, 2^28408951 is an apocalyptic number.

28408951 is a deficient number, since it is larger than the sum of its proper divisors (1043369).

28408951 is a wasteful number, since it uses less digits than its factorization.

28408951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2153.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 28408951 is about 5330.0047842380. The cubic root of 28408951 is about 305.1301102143.

The spelling of 28408951 in words is "twenty-eight million, four hundred eight thousand, nine hundred fifty-one".