61144420 has 24 divisors (see below), whose sum is σ = 130032000. Its totient is φ = 24147552.

The previous prime is 61144417. The next prime is 61144429. The reversal of 61144420 is 2444116.

It is a junction number, because it is equal to n+sod(n) for n = 61144391 and 61144400.

It is not an unprimeable number, because it can be changed into a prime (61144429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17770 + ... + 20929.

It is an arithmetic number, because the mean of its divisors is an integer number (5418000).

Almost surely, 2^61144420 is an apocalyptic number.

It is an amenable number.

61144420 is an abundant number, since it is smaller than the sum of its proper divisors (68887580).

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

61144420 is a wasteful number, since it uses less digits than its factorization.

61144420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38787 (or 38785 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 61144420 is about 7819.4897531744. The cubic root of 61144420 is about 393.9601340787.

Adding to 61144420 its reverse (2444116), we get a palindrome (63588536).

The spelling of 61144420 in words is "sixty-one million, one hundred forty-four thousand, four hundred twenty".