61383838 has 16 divisors (see below), whose sum is σ = 97717104. Its totient is φ = 28819840.

The previous prime is 61383781. The next prime is 61383841. The reversal of 61383838 is 83838316.

61383838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61383838² = 7535951135220488, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61383838.

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, 14856 + ... + 18532.

It is an arithmetic number, because the mean of its divisors is an integer number (6107319).

Almost surely, 2^61383838 is an apocalyptic number.

61383838 is a deficient number, since it is larger than the sum of its proper divisors (36333266).

61383838 is a wasteful number, since it uses less digits than its factorization.

61383838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4187.

The product of its digits is 82944, while the sum is 40.

The square root of 61383838 is about 7834.7838515175. The cubic root of 61383838 is about 394.4736631195.

The spelling of 61383838 in words is "sixty-one million, three hundred eighty-three thousand, eight hundred thirty-eight".