61448920 has 32 divisors (see below), whose sum is σ = 148896720. Its totient is φ = 22688640.

The previous prime is 61448879. The next prime is 61448927. The reversal of 61448920 is 2984416.

61448920 = 2017² + 2018² + ... + 2031².

61448920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61448927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58566 + ... + 59605.

Almost surely, 2^61448920 is an apocalyptic number.

It is an amenable number.

61448920 is an abundant number, since it is smaller than the sum of its proper divisors (87447800).

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

61448920 is a wasteful number, since it uses less digits than its factorization.

61448920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118195 (or 118191 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 61448920 is about 7838.9361523105. The cubic root of 61448920 is about 394.6130269859.

The spelling of 61448920 in words is "sixty-one million, four hundred forty-eight thousand, nine hundred twenty".