25428029 has 12 divisors (see below), whose sum is σ = 28855680. Its totient is φ = 22367400.

The previous prime is 25428019. The next prime is 25428037. The reversal of 25428029 is 92082452.

It is not a de Polignac number, because 25428029 - 2¹² = 25423933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25427986 and 25428004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25428019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 362 + ... + 7140.

It is an arithmetic number, because the mean of its divisors is an integer number (2404640).

Almost surely, 2^25428029 is an apocalyptic number.

It is an amenable number.

25428029 is a deficient number, since it is larger than the sum of its proper divisors (3427651).

25428029 is a wasteful number, since it uses less digits than its factorization.

25428029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6832 (or 6821 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 25428029 is about 5042.6212429648. The cubic root of 25428029 is about 294.0610922452.

The spelling of 25428029 in words is "twenty-five million, four hundred twenty-eight thousand, twenty-nine".