61309044 has 54 divisors (see below), whose sum is σ = 157454934. Its totient is φ = 20113920.

The previous prime is 61309043. The next prime is 61309049. The reversal of 61309044 is 44090316.

61309044 is a `hidden beast` number, since 613 + 0 + 9 + 0 + 44 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 144 + 61308900 = 12^2 + 7830^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61308999 and 61309017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61309043) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 338634 + ... + 338814.

Almost surely, 2^61309044 is an apocalyptic number.

It is an amenable number.

61309044 is an abundant number, since it is smaller than the sum of its proper divisors (96145890).

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

61309044 is a wasteful number, since it uses less digits than its factorization.

61309044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 61309044 is about 7830.0091953969. The cubic root of 61309044 is about 394.3133806763.

The spelling of 61309044 in words is "sixty-one million, three hundred nine thousand, forty-four".