61727428 has 48 divisors (see below), whose sum is σ = 134467200. Its totient is φ = 24192000.

The previous prime is 61727411. The next prime is 61727431. The reversal of 61727428 is 82472716.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13428 + ... + 17428.

It is an arithmetic number, because the mean of its divisors is an integer number (2801400).

Almost surely, 2^61727428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61727428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67233600).

61727428 is an abundant number, since it is smaller than the sum of its proper divisors (72739772).

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

61727428 is a wasteful number, since it uses less digits than its factorization.

61727428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4060 (or 4058 counting only the distinct ones).

The product of its digits is 37632, while the sum is 37.

The square root of 61727428 is about 7856.6804695113. The cubic root of 61727428 is about 395.2083033136.

The spelling of 61727428 in words is "sixty-one million, seven hundred twenty-seven thousand, four hundred twenty-eight".