61279722 has 48 divisors (see below), whose sum is σ = 152635392. Its totient is φ = 17405280.

The previous prime is 61279711. The next prime is 61279811. The reversal of 61279722 is 22797216.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21463 + ... + 24149.

It is an arithmetic number, because the mean of its divisors is an integer number (3179904).

Almost surely, 2^61279722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61279722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76317696).

61279722 is an abundant number, since it is smaller than the sum of its proper divisors (91355670).

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

61279722 is a wasteful number, since it uses less digits than its factorization.

61279722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2883 (or 2880 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 61279722 is about 7828.1365598717. The cubic root of 61279722 is about 394.2505084913.

It can be divided in two parts, 61279 and 722, that added together give a square (62001 = 249²).

The spelling of 61279722 in words is "sixty-one million, two hundred seventy-nine thousand, seven hundred twenty-two".