61571328 has 144 divisors (see below), whose sum is σ = 201914496. Its totient is φ = 16220160.

The previous prime is 61571303. The next prime is 61571329. The reversal of 61571328 is 82317516.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (61571329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69448 + ... + 70328.

It is an arithmetic number, because the mean of its divisors is an integer number (1402184).

Almost surely, 2^61571328 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 61571328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100957248).

61571328 is an abundant number, since it is smaller than the sum of its proper divisors (140343168).

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

61571328 is a wasteful number, since it uses less digits than its factorization.

61571328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920 (or 906 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 61571328 is about 7846.7399600089. The cubic root of 61571328 is about 394.8748799888.

The spelling of 61571328 in words is "sixty-one million, five hundred seventy-one thousand, three hundred twenty-eight".