61399386 has 48 divisors (see below), whose sum is σ = 137225088. Its totient is φ = 19828800.

The previous prime is 61399381. The next prime is 61399423. The reversal of 61399386 is 68399316.

61399386 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61399381) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 199845 + ... + 200151.

It is an arithmetic number, because the mean of its divisors is an integer number (2858856).

Almost surely, 2^61399386 is an apocalyptic number.

61399386 is an abundant number, since it is smaller than the sum of its proper divisors (75825702).

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

61399386 is a wasteful number, since it uses less digits than its factorization.

61399386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627 (or 624 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 61399386 is about 7835.7760304899. The cubic root of 61399386 is about 394.5069659071.

It can be divided in two parts, 613 and 99386, that added together give a palindrome (99999).

The spelling of 61399386 in words is "sixty-one million, three hundred ninety-nine thousand, three hundred eighty-six".