29866225 has 9 divisors (see below), whose sum is σ = 37068033. Its totient is φ = 23871120.

The previous prime is 29866223. The next prime is 29866231. The reversal of 29866225 is 52266892.

The square root of 29866225 is 5465.

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

It can be written as a sum of positive squares in 4 ways, for example, as 7436529 + 22429696 = 2727^2 + 4736^2 .

It is not a de Polignac number, because 29866225 - 2¹ = 29866223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29866223) 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, 26779 + ... + 27871.

Almost surely, 2^29866225 is an apocalyptic number.

29866225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

29866225 is the 5465-th square number.

29866225 is the 2733-rd centered octagonal number.

It is an amenable number.

29866225 is a deficient number, since it is larger than the sum of its proper divisors (7201808).

29866225 is an frugal number, since it uses more digits than its factorization.

29866225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2196 (or 1098 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The cubic root of 29866225 is about 310.2607068054.

The spelling of 29866225 in words is "twenty-nine million, eight hundred sixty-six thousand, two hundred twenty-five".