61985838 has 16 divisors (see below), whose sum is σ = 124125696. Its totient is φ = 20636280.

The previous prime is 61985837. The next prime is 61985857. The reversal of 61985838 is 83858916.

It is a super-2 number, since 2×61985838² = 7684488225124488, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61985831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 808 + ... + 11163.

It is an arithmetic number, because the mean of its divisors is an integer number (7757856).

Almost surely, 2^61985838 is an apocalyptic number.

61985838 is an abundant number, since it is smaller than the sum of its proper divisors (62139858).

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

61985838 is a wasteful number, since it uses less digits than its factorization.

61985838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12839.

The product of its digits is 414720, while the sum is 48.

The square root of 61985838 is about 7873.1085347530. The cubic root of 61985838 is about 395.7590233717.

The spelling of 61985838 in words is "sixty-one million, nine hundred eighty-five thousand, eight hundred thirty-eight".