28761731 has 2 divisors, whose sum is σ = 28761732. Its totient is φ = 28761730.

The previous prime is 28761709. The next prime is 28761737. The reversal of 28761731 is 13716782.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28761731 is a prime.

It is a super-2 number, since 2×28761731² = 1654474340232722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28761691 and 28761700.

It is not a weakly prime, because it can be changed into another prime (28761737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14380865 + 14380866.

It is an arithmetic number, because the mean of its divisors is an integer number (14380866).

Almost surely, 2^28761731 is an apocalyptic number.

28761731 is a deficient number, since it is larger than the sum of its proper divisors (1).

28761731 is an equidigital number, since it uses as much as digits as its factorization.

28761731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 35.

The square root of 28761731 is about 5362.9964572056. The cubic root of 28761731 is about 306.3879447420.

It can be divided in two parts, 28761 and 731, that added together give a palindrome (29492).

The spelling of 28761731 in words is "twenty-eight million, seven hundred sixty-one thousand, seven hundred thirty-one".