61788936 has 64 divisors (see below), whose sum is σ = 172465920. Its totient is φ = 18285120.

The previous prime is 61788911. The next prime is 61788943. The reversal of 61788936 is 63988716.

61788936 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61788936² = 7635745224024192, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8631 + ... + 14073.

It is an arithmetic number, because the mean of its divisors is an integer number (2694780).

Almost surely, 2^61788936 is an apocalyptic number.

61788936 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61788936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86232960).

61788936 is an abundant number, since it is smaller than the sum of its proper divisors (110676984).

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

61788936 is a wasteful number, since it uses less digits than its factorization.

61788936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5506 (or 5502 counting only the distinct ones).

The product of its digits is 435456, while the sum is 48.

The square root of 61788936 is about 7860.5938706945. The cubic root of 61788936 is about 395.3395275443.

The spelling of 61788936 in words is "sixty-one million, seven hundred eighty-eight thousand, nine hundred thirty-six".