28841731 has 2 divisors, whose sum is σ = 28841732. Its totient is φ = 28841730.

The previous prime is 28841723. The next prime is 28841767. The reversal of 28841731 is 13714882.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28841731 - 2³ = 28841723 is a prime.

It is a super-2 number, since 2×28841731² = 1663690894152722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28841711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14420865 + 14420866.

It is an arithmetic number, because the mean of its divisors is an integer number (14420866).

Almost surely, 2^28841731 is an apocalyptic number.

28841731 is a deficient number, since it is larger than the sum of its proper divisors (1).

28841731 is an equidigital number, since it uses as much as digits as its factorization.

28841731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 34.

The square root of 28841731 is about 5370.4497949427. The cubic root of 28841731 is about 306.6717517798.

It can be divided in two parts, 28841 and 731, that multiplied together give a triangular number (21082771 = T₆₄₉₃).

The spelling of 28841731 in words is "twenty-eight million, eight hundred forty-one thousand, seven hundred thirty-one".