61380072 has 64 divisors (see below), whose sum is σ = 183624000. Its totient is φ = 18885312.

The previous prime is 61380071. The next prime is 61380097. The reversal of 61380072 is 27008316.

61380072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (61380071) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8122 + ... + 13737.

It is an arithmetic number, because the mean of its divisors is an integer number (2869125).

Almost surely, 2^61380072 is an apocalyptic number.

It is an amenable number.

61380072 is an abundant number, since it is smaller than the sum of its proper divisors (122243928).

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

61380072 is a wasteful number, since it uses less digits than its factorization.

61380072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21887 (or 21877 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 61380072 is about 7834.5435093565. The cubic root of 61380072 is about 394.4655957506.

Adding to 61380072 its reverse (27008316), we get a palindrome (88388388).

The spelling of 61380072 in words is "sixty-one million, three hundred eighty thousand, seventy-two".