61188620 has 12 divisors (see below), whose sum is σ = 128496144. Its totient is φ = 24475440.

The previous prime is 61188601. The next prime is 61188629. The reversal of 61188620 is 2688116.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (61188629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1529696 + ... + 1529735.

It is an arithmetic number, because the mean of its divisors is an integer number (10708012).

Almost surely, 2^61188620 is an apocalyptic number.

It is an amenable number.

61188620 is an abundant number, since it is smaller than the sum of its proper divisors (67307524).

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

61188620 is a wasteful number, since it uses less digits than its factorization.

61188620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3059440 (or 3059438 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 61188620 is about 7822.3155139639. The cubic root of 61188620 is about 394.0550396796.

The spelling of 61188620 in words is "sixty-one million, one hundred eighty-eight thousand, six hundred twenty".