61849044 has 18 divisors (see below), whose sum is σ = 156340730. Its totient is φ = 20616336.

The previous prime is 61849019. The next prime is 61849049. The reversal of 61849044 is 44094816.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 36144144 + 25704900 = 6012^2 + 5070^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1718029 = 61849044 / (6 + 1 + 8 + 4 + 9 + 0 + 4 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61849049) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 858979 + ... + 859050.

Almost surely, 2^61849044 is an apocalyptic number.

It is an amenable number.

61849044 is an abundant number, since it is smaller than the sum of its proper divisors (94491686).

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

61849044 is a wasteful number, since it uses less digits than its factorization.

61849044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718039 (or 1718034 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 61849044 is about 7864.4163165489. The cubic root of 61849044 is about 395.4676808378.

The spelling of 61849044 in words is "sixty-one million, eight hundred forty-nine thousand, forty-four".