29161280 has 28 divisors (see below), whose sum is σ = 69441060. Its totient is φ = 11664384.

The previous prime is 29161259. The next prime is 29161283. The reversal of 29161280 is 8216192.

It can be written as a sum of positive squares in 2 ways, for example, as 12054784 + 17106496 = 3472^2 + 4136^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29161283) 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, 45245 + ... + 45884.

Almost surely, 2^29161280 is an apocalyptic number.

29161280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29161280 is an abundant number, since it is smaller than the sum of its proper divisors (40279780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

29161280 is an equidigital number, since it uses as much as digits as its factorization.

29161280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91146 (or 91136 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 29161280 is about 5400.1185172179. The cubic root of 29161280 is about 307.8001739763.

The spelling of 29161280 in words is "twenty-nine million, one hundred sixty-one thousand, two hundred eighty".