61030644 has 12 divisors (see below), whose sum is σ = 142404864. Its totient is φ = 20343544.

The previous prime is 61030643. The next prime is 61030657. The reversal of 61030644 is 44603016.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61030643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2542932 + ... + 2542955.

It is an arithmetic number, because the mean of its divisors is an integer number (11867072).

Almost surely, 2^61030644 is an apocalyptic number.

It is an amenable number.

61030644 is an abundant number, since it is smaller than the sum of its proper divisors (81374220).

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

61030644 is a wasteful number, since it uses less digits than its factorization.

61030644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5085894 (or 5085892 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 61030644 is about 7812.2112106624. The cubic root of 61030644 is about 393.7156253186.

The spelling of 61030644 in words is "sixty-one million, thirty thousand, six hundred forty-four".