61329138 has 16 divisors (see below), whose sum is σ = 132093696. Its totient is φ = 18870480.

The previous prime is 61329133. The next prime is 61329139. The reversal of 61329138 is 83192316.

It is a super-2 number, since 2×61329138² = 7522526335646088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61329099 and 61329108.

It is not an unprimeable number, because it can be changed into a prime (61329133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393058 + ... + 393213.

It is an arithmetic number, because the mean of its divisors is an integer number (8255856).

Almost surely, 2^61329138 is an apocalyptic number.

61329138 is an abundant number, since it is smaller than the sum of its proper divisors (70764558).

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

61329138 is a wasteful number, since it uses less digits than its factorization.

61329138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786289.

The product of its digits is 7776, while the sum is 33.

The square root of 61329138 is about 7831.2922305326. The cubic root of 61329138 is about 394.3564546237.

The spelling of 61329138 in words is "sixty-one million, three hundred twenty-nine thousand, one hundred thirty-eight".