61186020 has 48 divisors (see below), whose sum is σ = 195796608. Its totient is φ = 13985280.

The previous prime is 61186001. The next prime is 61186031. The reversal of 61186020 is 2068116.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72421 + ... + 73260.

It is an arithmetic number, because the mean of its divisors is an integer number (4079096).

Almost surely, 2^61186020 is an apocalyptic number.

61186020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61186020 is an abundant number, since it is smaller than the sum of its proper divisors (134610588).

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

61186020 is a wasteful number, since it uses less digits than its factorization.

61186020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145700 (or 145698 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 61186020 is about 7822.1493209987. The cubic root of 61186020 is about 394.0494582626.

The spelling of 61186020 in words is "sixty-one million, one hundred eighty-six thousand, twenty".