61440029 has 8 divisors (see below), whose sum is σ = 70339200. Its totient is φ = 52571376.

The previous prime is 61440007. The next prime is 61440037. The reversal of 61440029 is 92004416.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61440029 - 2²⁰ = 60391453 is a prime.

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 (61440089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3134 + ... + 11519.

It is an arithmetic number, because the mean of its divisors is an integer number (8792400).

Almost surely, 2^61440029 is an apocalyptic number.

It is an amenable number.

61440029 is a deficient number, since it is larger than the sum of its proper divisors (8899171).

61440029 is a wasteful number, since it uses less digits than its factorization.

61440029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15259.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 61440029 is about 7838.3690267810. The cubic root of 61440029 is about 394.5939939763.

The spelling of 61440029 in words is "sixty-one million, four hundred forty thousand, twenty-nine".