61444236 has 72 divisors (see below), whose sum is σ = 168920640. Its totient is φ = 17330208.

The previous prime is 61444223. The next prime is 61444249. The reversal of 61444236 is 63244416.

It is an interprime number because it is at equal distance from previous prime (61444223) and next prime (61444249).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48175 + ... + 49433.

It is an arithmetic number, because the mean of its divisors is an integer number (2346120).

Almost surely, 2^61444236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61444236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84460320).

61444236 is an abundant number, since it is smaller than the sum of its proper divisors (107476404).

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

61444236 is a wasteful number, since it uses less digits than its factorization.

61444236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363 (or 1354 counting only the distinct ones).

The product of its digits is 13824, while the sum is 30.

The square root of 61444236 is about 7838.6373815862. The cubic root of 61444236 is about 394.6030001518.

It can be divided in two parts, 614 and 44236, that added together give a triangular number (44850 = T₂₉₉).

The spelling of 61444236 in words is "sixty-one million, four hundred forty-four thousand, two hundred thirty-six".