28950405 has 32 divisors (see below), whose sum is σ = 53509248. Its totient is φ = 13209600.

The previous prime is 28950379. The next prime is 28950421. The reversal of 28950405 is 50405982.

It is not a de Polignac number, because 28950405 - 2⁷ = 28950277 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2356 + ... + 7965.

It is an arithmetic number, because the mean of its divisors is an integer number (1672164).

Almost surely, 2^28950405 is an apocalyptic number.

It is an amenable number.

28950405 is a deficient number, since it is larger than the sum of its proper divisors (24558843).

28950405 is a wasteful number, since it uses less digits than its factorization.

28950405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10357.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 28950405 is about 5380.5580565588. The cubic root of 28950405 is about 307.0564429179.

The spelling of 28950405 in words is "twenty-eight million, nine hundred fifty thousand, four hundred five".