61109838 has 24 divisors (see below), whose sum is σ = 132868008. Its totient is φ = 20298672.

The previous prime is 61109831. The next prime is 61109857. The reversal of 61109838 is 83890116.

61109838 is a `hidden beast` number, since 611 + 0 + 9 + 8 + 38 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61109831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 520 + ... + 11067.

It is an arithmetic number, because the mean of its divisors is an integer number (5536167).

Almost surely, 2^61109838 is an apocalyptic number.

61109838 is an abundant number, since it is smaller than the sum of its proper divisors (71758170).

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

61109838 is a wasteful number, since it uses less digits than its factorization.

61109838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11888 (or 11885 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 61109838 is about 7817.2781708214. The cubic root of 61109838 is about 393.8858482124.

The spelling of 61109838 in words is "sixty-one million, one hundred nine thousand, eight hundred thirty-eight".