28631429 has 2 divisors, whose sum is σ = 28631430. Its totient is φ = 28631428.

The previous prime is 28631401. The next prime is 28631443. The reversal of 28631429 is 92413682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27196225 + 1435204 = 5215^2 + 1198^2 .

It is a cyclic number.

It is not a de Polignac number, because 28631429 - 2¹⁶ = 28565893 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28631459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14315714 + 14315715.

It is an arithmetic number, because the mean of its divisors is an integer number (14315715).

Almost surely, 2^28631429 is an apocalyptic number.

It is an amenable number.

28631429 is a deficient number, since it is larger than the sum of its proper divisors (1).

28631429 is an equidigital number, since it uses as much as digits as its factorization.

28631429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 35.

The square root of 28631429 is about 5350.8344209104. The cubic root of 28631429 is about 305.9245581317.

The spelling of 28631429 in words is "twenty-eight million, six hundred thirty-one thousand, four hundred twenty-nine".