61320732 has 96 divisors (see below), whose sum is σ = 164263680. Its totient is φ = 17633280.

The previous prime is 61320731. The next prime is 61320739. The reversal of 61320732 is 23702316.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61320731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 317628 + ... + 317820.

It is an arithmetic number, because the mean of its divisors is an integer number (1711080).

Almost surely, 2^61320732 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 61320732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82131840).

61320732 is an abundant number, since it is smaller than the sum of its proper divisors (102942948).

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

61320732 is a wasteful number, since it uses less digits than its factorization.

61320732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 61320732 is about 7830.7555191054. The cubic root of 61320732 is about 394.3384364792.

The spelling of 61320732 in words is "sixty-one million, three hundred twenty thousand, seven hundred thirty-two".