61309238 has 16 divisors (see below), whose sum is σ = 97807920. Its totient is φ = 28740096.

The previous prime is 61309231. The next prime is 61309243. The reversal of 61309238 is 83290316.

61309238 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61309231) 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 7 ways as a sum of consecutive naturals, for example, 4631 + ... + 12002.

It is an arithmetic number, because the mean of its divisors is an integer number (6112995).

Almost surely, 2^61309238 is an apocalyptic number.

61309238 is a deficient number, since it is larger than the sum of its proper divisors (36498682).

61309238 is a wasteful number, since it uses less digits than its factorization.

61309238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16751.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 61309238 is about 7830.0215836229. The cubic root of 61309238 is about 394.3137965841.

The spelling of 61309238 in words is "sixty-one million, three hundred nine thousand, two hundred thirty-eight".