29528381 has 4 divisors (see below), whose sum is σ = 29541564. Its totient is φ = 29515200.

The previous prime is 29528363. The next prime is 29528419. The reversal of 29528381 is 18382592.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16532356 + 12996025 = 4066^2 + 3605^2 .

It is a cyclic number.

It is not a de Polignac number, because 29528381 - 2¹⁰ = 29527357 is a prime.

It is a super-2 number, since 2×29528381² = 1743850568962322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29528311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2300 + ... + 8021.

It is an arithmetic number, because the mean of its divisors is an integer number (7385391).

Almost surely, 2^29528381 is an apocalyptic number.

It is an amenable number.

29528381 is a deficient number, since it is larger than the sum of its proper divisors (13183).

29528381 is a wasteful number, since it uses less digits than its factorization.

29528381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13182.

The product of its digits is 34560, while the sum is 38.

The square root of 29528381 is about 5434.0023003308. The cubic root of 29528381 is about 309.0863874535.

The spelling of 29528381 in words is "twenty-nine million, five hundred twenty-eight thousand, three hundred eighty-one".