1206561444 has 48 divisors (see below), whose sum is σ = 3082195200. Its totient is φ = 364321440.

The previous prime is 1206561431. The next prime is 1206561457. The reversal of 1206561444 is 4441656021.

It is an interprime number because it is at equal distance from previous prime (1206561431) and next prime (1206561457).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21207 + ... + 53505.

It is an arithmetic number, because the mean of its divisors is an integer number (64212400).

Almost surely, 2^1206561444 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 1206561444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1541097600).

1206561444 is an abundant number, since it is smaller than the sum of its proper divisors (1875633756).

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

1206561444 is a wasteful number, since it uses less digits than its factorization.

1206561444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32600 (or 32598 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 1206561444 is about 34735.5933301851. The cubic root of 1206561444 is about 1064.5918760658.

The spelling of 1206561444 in words is "one billion, two hundred six million, five hundred sixty-one thousand, four hundred forty-four".