61399104 has 112 divisors (see below), whose sum is σ = 185367168. Its totient is φ = 17768448.

The previous prime is 61399103. The next prime is 61399111. The reversal of 61399104 is 40199316.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61399103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41709 + ... + 43155.

It is an arithmetic number, because the mean of its divisors is an integer number (1655064).

Almost surely, 2^61399104 is an apocalyptic number.

61399104 is a gapful number since it is divisible by the number (64) 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 61399104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92683584).

61399104 is an abundant number, since it is smaller than the sum of its proper divisors (123968064).

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

61399104 is a wasteful number, since it uses less digits than its factorization.

61399104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492 (or 1482 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 61399104 is about 7835.7580360805. The cubic root of 61399104 is about 394.5063619318.

The spelling of 61399104 in words is "sixty-one million, three hundred ninety-nine thousand, one hundred four".