61443320 has 16 divisors (see below), whose sum is σ = 138247560. Its totient is φ = 24577312.

The previous prime is 61443313. The next prime is 61443331. The reversal of 61443320 is 2334416.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 768002 + ... + 768081.

Almost surely, 2^61443320 is an apocalyptic number.

It is an amenable number.

61443320 is an abundant number, since it is smaller than the sum of its proper divisors (76804240).

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

61443320 is a wasteful number, since it uses less digits than its factorization.

61443320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536094 (or 1536090 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 61443320 is about 7838.5789528460. The cubic root of 61443320 is about 394.6010392510.

Adding to 61443320 its reverse (2334416), we get a palindrome (63777736).

It can be divided in two parts, 614 and 43320, that added together give a palindrome (43934).

The spelling of 61443320 in words is "sixty-one million, four hundred forty-three thousand, three hundred twenty".