28951401 has 4 divisors (see below), whose sum is σ = 38601872. Its totient is φ = 19300932.

The previous prime is 28951399. The next prime is 28951423. The reversal of 28951401 is 10415982.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28951401 - 2¹ = 28951399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28951471) 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, 4825231 + ... + 4825236.

It is an arithmetic number, because the mean of its divisors is an integer number (9650468).

Almost surely, 2^28951401 is an apocalyptic number.

It is an amenable number.

28951401 is a deficient number, since it is larger than the sum of its proper divisors (9650471).

28951401 is an equidigital number, since it uses as much as digits as its factorization.

28951401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9650470.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 28951401 is about 5380.6506112179. The cubic root of 28951401 is about 307.0599641664.

The spelling of 28951401 in words is "twenty-eight million, nine hundred fifty-one thousand, four hundred one".