61858620 has 48 divisors (see below), whose sum is σ = 192450720. Its totient is φ = 16495488.

The previous prime is 61858619. The next prime is 61858673. The reversal of 61858620 is 2685816.

It is a happy number.

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 (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56737 + ... + 57816.

It is an arithmetic number, because the mean of its divisors is an integer number (4009390).

Almost surely, 2^61858620 is an apocalyptic number.

61858620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61858620 is an abundant number, since it is smaller than the sum of its proper divisors (130592100).

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

61858620 is a wasteful number, since it uses less digits than its factorization.

61858620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114571 (or 114563 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 61858620 is about 7865.0251112123. The cubic root of 61858620 is about 395.4880896851.

The spelling of 61858620 in words is "sixty-one million, eight hundred fifty-eight thousand, six hundred twenty".