61864120 has 32 divisors (see below), whose sum is σ = 139669920. Its totient is φ = 24661120.

The previous prime is 61864109. The next prime is 61864147. The reversal of 61864120 is 2146816.

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 7 ways as a sum of consecutive naturals, for example, 9954 + ... + 14926.

It is an arithmetic number, because the mean of its divisors is an integer number (4364685).

Almost surely, 2^61864120 is an apocalyptic number.

It is an amenable number.

61864120 is an abundant number, since it is smaller than the sum of its proper divisors (77805800).

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

61864120 is a wasteful number, since it uses less digits than its factorization.

61864120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5295 (or 5291 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 61864120 is about 7865.3747526739. The cubic root of 61864120 is about 395.4998106063.

The spelling of 61864120 in words is "sixty-one million, eight hundred sixty-four thousand, one hundred twenty".