28944901 has 2 divisors, whose sum is σ = 28944902. Its totient is φ = 28944900.

The previous prime is 28944859. The next prime is 28944907. The reversal of 28944901 is 10944982.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28879876 + 65025 = 5374^2 + 255^2 .

It is a cyclic number.

It is not a de Polignac number, because 28944901 - 2¹³ = 28936709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28944907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14472450 + 14472451.

It is an arithmetic number, because the mean of its divisors is an integer number (14472451).

Almost surely, 2^28944901 is an apocalyptic number.

It is an amenable number.

28944901 is a deficient number, since it is larger than the sum of its proper divisors (1).

28944901 is an equidigital number, since it uses as much as digits as its factorization.

28944901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 28944901 is about 5380.0465611368. The cubic root of 28944901 is about 307.0369826745.

The spelling of 28944901 in words is "twenty-eight million, nine hundred forty-four thousand, nine hundred one".