61672224 has 24 divisors (see below), whose sum is σ = 161889840. Its totient is φ = 20557376.

The previous prime is 61672217. The next prime is 61672249. The reversal of 61672224 is 42227616.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-3 number, since 3×61672224³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61672191 and 61672200.

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 3 ways as a sum of consecutive naturals, for example, 321114 + ... + 321305.

It is an arithmetic number, because the mean of its divisors is an integer number (6745410).

Almost surely, 2^61672224 is an apocalyptic number.

It is an amenable number.

61672224 is an abundant number, since it is smaller than the sum of its proper divisors (100217616).

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

61672224 is a wasteful number, since it uses less digits than its factorization.

61672224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642432 (or 642424 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 61672224 is about 7853.1664951152. The cubic root of 61672224 is about 395.0904541017.

The spelling of 61672224 in words is "sixty-one million, six hundred seventy-two thousand, two hundred twenty-four".