61389444 has 12 divisors (see below), whose sum is σ = 143242064. Its totient is φ = 20463144.

The previous prime is 61389439. The next prime is 61389451. The reversal of 61389444 is 44498316.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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, 2557882 + ... + 2557905.

Almost surely, 2^61389444 is an apocalyptic number.

It is an amenable number.

61389444 is an abundant number, since it is smaller than the sum of its proper divisors (81852620).

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

61389444 is a wasteful number, since it uses less digits than its factorization.

61389444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5115794 (or 5115792 counting only the distinct ones).

The product of its digits is 82944, while the sum is 39.

The square root of 61389444 is about 7835.1416068888. The cubic root of 61389444 is about 394.4856714489.

The spelling of 61389444 in words is "sixty-one million, three hundred eighty-nine thousand, four hundred forty-four".