61538384 has 10 divisors (see below), whose sum is σ = 119230650. Its totient is φ = 30769184.

The previous prime is 61538381. The next prime is 61538413. The reversal of 61538384 is 48383516.

It can be written as a sum of positive squares in only one way, i.e., 53290000 + 8248384 = 7300^2 + 2872^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61538381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1923059 + ... + 1923090.

It is an arithmetic number, because the mean of its divisors is an integer number (11923065).

Almost surely, 2^61538384 is an apocalyptic number.

It is an amenable number.

61538384 is a deficient number, since it is larger than the sum of its proper divisors (57692266).

61538384 is a wasteful number, since it uses less digits than its factorization.

61538384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3846157 (or 3846151 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 61538384 is about 7844.6404633992. The cubic root of 61538384 is about 394.8044409317.

The spelling of 61538384 in words is "sixty-one million, five hundred thirty-eight thousand, three hundred eighty-four".