61858020 has 96 divisors (see below), whose sum is σ = 204374016. Its totient is φ = 13680000.

The previous prime is 61858007. The next prime is 61858021. The reversal of 61858020 is 2085816.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (61858021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10645 + ... + 15395.

It is an arithmetic number, because the mean of its divisors is an integer number (2128896).

Almost surely, 2^61858020 is an apocalyptic number.

61858020 is a gapful number since it is divisible by the number (60) 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 61858020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102187008).

61858020 is an abundant number, since it is smaller than the sum of its proper divisors (142515996).

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

61858020 is a wasteful number, since it uses less digits than its factorization.

61858020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4801 (or 4799 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 61858020 is about 7864.9869675671. The cubic root of 61858020 is about 395.4868109971.

The spelling of 61858020 in words is "sixty-one million, eight hundred fifty-eight thousand, twenty".