61728392 has 48 divisors (see below), whose sum is σ = 130265520. Its totient is φ = 27387360.

The previous prime is 61728391. The next prime is 61728413. The reversal of 61728392 is 29382716.

It is not an unprimeable number, because it can be changed into a prime (61728391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40883 + ... + 42365.

It is an arithmetic number, because the mean of its divisors is an integer number (2713865).

Almost surely, 2^61728392 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 61728392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65132760).

61728392 is an abundant number, since it is smaller than the sum of its proper divisors (68537128).

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

61728392 is a wasteful number, since it uses less digits than its factorization.

61728392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554 (or 1539 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 61728392 is about 7856.7418183367. The cubic root of 61728392 is about 395.2103606314.

The spelling of 61728392 in words is "sixty-one million, seven hundred twenty-eight thousand, three hundred ninety-two".