61847220 has 24 divisors (see below), whose sum is σ = 173172384. Its totient is φ = 16492576.

The previous prime is 61847213. The next prime is 61847221. The reversal of 61847220 is 2274816.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61847221) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 515334 + ... + 515453.

It is an arithmetic number, because the mean of its divisors is an integer number (7215516).

Almost surely, 2^61847220 is an apocalyptic number.

61847220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61847220 is an abundant number, since it is smaller than the sum of its proper divisors (111325164).

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

61847220 is a wasteful number, since it uses less digits than its factorization.

61847220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030799 (or 1030797 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 61847220 is about 7864.3003503172. The cubic root of 61847220 is about 395.4637931995.

The spelling of 61847220 in words is "sixty-one million, eight hundred forty-seven thousand, two hundred twenty".