61320432 has 80 divisors (see below), whose sum is σ = 163005440. Its totient is φ = 19858176.

The previous prime is 61320421. The next prime is 61320443. The reversal of 61320432 is 23402316.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (61320421) and next prime (61320443).

It is a junction number, because it is equal to n+sod(n) for n = 61320399 and 61320408.

It is a congruent number.

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, 390498 + ... + 390654.

It is an arithmetic number, because the mean of its divisors is an integer number (2037568).

Almost surely, 2^61320432 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 61320432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81502720).

61320432 is an abundant number, since it is smaller than the sum of its proper divisors (101685008).

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

61320432 is a wasteful number, since it uses less digits than its factorization.

61320432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 61320432 is about 7830.7363638422. The cubic root of 61320432 is about 394.3377934029.

Adding to 61320432 its reverse (23402316), we get a palindrome (84722748).

The spelling of 61320432 in words is "sixty-one million, three hundred twenty thousand, four hundred thirty-two".