61338878 has 32 divisors (see below), whose sum is σ = 99792000. Its totient is φ = 28188000.

The previous prime is 61338847. The next prime is 61338899. The reversal of 61338878 is 87883316.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244253 + ... + 244503.

It is an arithmetic number, because the mean of its divisors is an integer number (3118500).

Almost surely, 2^61338878 is an apocalyptic number.

61338878 is a deficient number, since it is larger than the sum of its proper divisors (38453122).

61338878 is a wasteful number, since it uses less digits than its factorization.

61338878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440.

The product of its digits is 193536, while the sum is 44.

The square root of 61338878 is about 7831.9140700087. The cubic root of 61338878 is about 394.3773301199.

The spelling of 61338878 in words is "sixty-one million, three hundred thirty-eight thousand, eight hundred seventy-eight".