61728401 has 8 divisors (see below), whose sum is σ = 71703744. Its totient is φ = 52042320.

The previous prime is 61728391. The next prime is 61728413. The reversal of 61728401 is 10482716.

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 61728401 - 2¹⁴ = 61712017 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61724401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71855 + ... + 72708.

It is an arithmetic number, because the mean of its divisors is an integer number (8962968).

Almost surely, 2^61728401 is an apocalyptic number.

61728401 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

61728401 is a deficient number, since it is larger than the sum of its proper divisors (9975343).

61728401 is a wasteful number, since it uses less digits than its factorization.

61728401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144631.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 61728401 is about 7856.7423910931. The cubic root of 61728401 is about 395.2103798386.

The spelling of 61728401 in words is "sixty-one million, seven hundred twenty-eight thousand, four hundred one".