61672280 has 32 divisors (see below), whose sum is σ = 140119200. Its totient is φ = 24427776.

The previous prime is 61672279. The next prime is 61672297. The reversal of 61672280 is 8227616.

61672280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3365 + ... + 11604.

It is an arithmetic number, because the mean of its divisors is an integer number (4378725).

Almost surely, 2^61672280 is an apocalyptic number.

It is an amenable number.

61672280 is an abundant number, since it is smaller than the sum of its proper divisors (78446920).

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

61672280 is a wasteful number, since it uses less digits than its factorization.

61672280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15083 (or 15079 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 61672280 is about 7853.1700605552. The cubic root of 61672280 is about 395.0905736858.

Adding to 61672280 its reverse (8227616), we get a palindrome (69899896).

The spelling of 61672280 in words is "sixty-one million, six hundred seventy-two thousand, two hundred eighty".