61388 has 12 divisors (see below), whose sum is σ = 109200. Its totient is φ = 30192.

The previous prime is 61381. The next prime is 61403. The reversal of 61388 is 88316.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61381) by changing a digit.

61388 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338 + ... + 486.

It is an arithmetic number, because the mean of its divisors is an integer number (9100).

2⁶¹³⁸⁸ is an apocalyptic number.

It is an amenable number.

61388 is a deficient number, since it is larger than the sum of its proper divisors (47812).

61388 is a wasteful number, since it uses less digits than its factorization.

61388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 254 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 61388 is about 247.7660186547. The cubic root of 61388 is about 39.4482578399.

The spelling of 61388 in words is "sixty-one thousand, three hundred eighty-eight".