61728126 has 16 divisors (see below), whose sum is σ = 123533328. Its totient is φ = 20563200.

The previous prime is 61728119. The next prime is 61728127. The reversal of 61728126 is 62182716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61728127) 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, 16686 + ... + 20046.

It is an arithmetic number, because the mean of its divisors is an integer number (7720833).

Almost surely, 2^61728126 is an apocalyptic number.

61728126 is an abundant number, since it is smaller than the sum of its proper divisors (61805202).

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

61728126 is a wasteful number, since it uses less digits than its factorization.

61728126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6427.

The product of its digits is 8064, while the sum is 33.

The square root of 61728126 is about 7856.7248901817. The cubic root of 61728126 is about 395.2097929504.

The spelling of 61728126 in words is "sixty-one million, seven hundred twenty-eight thousand, one hundred twenty-six".