28929451 has 2 divisors, whose sum is σ = 28929452. Its totient is φ = 28929450.

The previous prime is 28929437. The next prime is 28929473. The reversal of 28929451 is 15492982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28929451 - 2⁷ = 28929323 is a prime.

It is a super-2 number, since 2×28929451² = 1673826270322802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28929491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14464725 + 14464726.

It is an arithmetic number, because the mean of its divisors is an integer number (14464726).

Almost surely, 2^28929451 is an apocalyptic number.

28929451 is a deficient number, since it is larger than the sum of its proper divisors (1).

28929451 is an equidigital number, since it uses as much as digits as its factorization.

28929451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 40.

The square root of 28929451 is about 5378.6105083004. The cubic root of 28929451 is about 306.9823436248.

The spelling of 28929451 in words is "twenty-eight million, nine hundred twenty-nine thousand, four hundred fifty-one".