28662031 has 2 divisors, whose sum is σ = 28662032. Its totient is φ = 28662030.

The previous prime is 28662019. The next prime is 28662047. The reversal of 28662031 is 13026682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28662031 - 2⁵ = 28661999 is a prime.

It is a super-2 number, since 2×28662031² = 1643024042089922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28662001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14331015 + 14331016.

It is an arithmetic number, because the mean of its divisors is an integer number (14331016).

Almost surely, 2^28662031 is an apocalyptic number.

28662031 is a deficient number, since it is larger than the sum of its proper divisors (1).

28662031 is an equidigital number, since it uses as much as digits as its factorization.

28662031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 28662031 is about 5353.6932112328. The cubic root of 28662031 is about 306.0335126410.

It can be divided in two parts, 286620 and 31, that multiplied together give a triangular number (8885220 = T₄₂₁₅).

The spelling of 28662031 in words is "twenty-eight million, six hundred sixty-two thousand, thirty-one".