29800681 has 9 divisors (see below), whose sum is σ = 30671319. Its totient is φ = 28954536.

The previous prime is 29800669. The next prime is 29800691. The reversal of 29800681 is 18600892.

The square root of 29800681 is 5459.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 21483225 + 8317456 = 4635^2 + 2884^2 .

It is not a de Polignac number, because 29800681 - 2⁷ = 29800553 is a prime.

It is a super-2 number, since 2×29800681² = 1776161176127522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29800601) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 289276 + ... + 289378.

Almost surely, 2^29800681 is an apocalyptic number.

29800681 is the 5459-th square number.

29800681 is the 2730-th centered octagonal number.

It is an amenable number.

29800681 is a deficient number, since it is larger than the sum of its proper divisors (870638).

29800681 is an frugal number, since it uses more digits than its factorization.

29800681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The cubic root of 29800681 is about 310.0335759678.

The spelling of 29800681 in words is "twenty-nine million, eight hundred thousand, six hundred eighty-one".