61397232 has 80 divisors (see below), whose sum is σ = 173718048. Its totient is φ = 18570240.

The previous prime is 61397221. The next prime is 61397239. The reversal of 61397232 is 23279316.

It is a happy number.

61397232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 61397193 and 61397202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61397239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37258 + ... + 38870.

Almost surely, 2^61397232 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 61397232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86859024).

61397232 is an abundant number, since it is smaller than the sum of its proper divisors (112320816).

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

61397232 is a wasteful number, since it uses less digits than its factorization.

61397232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698 (or 1692 counting only the distinct ones).

The product of its digits is 13608, while the sum is 33.

The square root of 61397232 is about 7835.6385827832. The cubic root of 61397232 is about 394.5023525171.

The spelling of 61397232 in words is "sixty-one million, three hundred ninety-seven thousand, two hundred thirty-two".