61099380 has 48 divisors (see below), whose sum is σ = 190088640. Its totient is φ = 16293024.

The previous prime is 61099327. The next prime is 61099391. The reversal of 61099380 is 8399016.

61099380 is a `hidden beast` number, since 610 + 9 + 9 + 38 + 0 = 666.

61099380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 56034 + ... + 57113.

It is an arithmetic number, because the mean of its divisors is an integer number (3960180).

Almost surely, 2^61099380 is an apocalyptic number.

61099380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61099380 is an abundant number, since it is smaller than the sum of its proper divisors (128989260).

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

61099380 is a wasteful number, since it uses less digits than its factorization.

61099380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113165 (or 113157 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 61099380 is about 7816.6092393057. The cubic root of 61099380 is about 393.8633777813.

The spelling of 61099380 in words is "sixty-one million, ninety-nine thousand, three hundred eighty".