28944151 has 4 divisors (see below), whose sum is σ = 29560032. Its totient is φ = 28328272.

The previous prime is 28944119. The next prime is 28944169. The reversal of 28944151 is 15144982.

It is a happy number.

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 28944151 - 2⁵ = 28944119 is a prime.

It is a super-2 number, since 2×28944151² = 1675527754221602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28944551) 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, 307870 + ... + 307963.

It is an arithmetic number, because the mean of its divisors is an integer number (7390008).

Almost surely, 2^28944151 is an apocalyptic number.

28944151 is a deficient number, since it is larger than the sum of its proper divisors (615881).

28944151 is an equidigital number, since it uses as much as digits as its factorization.

28944151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615880.

The product of its digits is 11520, while the sum is 34.

The square root of 28944151 is about 5379.9768586863. The cubic root of 28944151 is about 307.0343307426.

The spelling of 28944151 in words is "twenty-eight million, nine hundred forty-four thousand, one hundred fifty-one".