61449872 has 40 divisors (see below), whose sum is σ = 131375520. Its totient is φ = 27610880.

The previous prime is 61449863. The next prime is 61449877. The reversal of 61449872 is 27894416.

It is not an unprimeable number, because it can be changed into a prime (61449877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13703 + ... + 17625.

It is an arithmetic number, because the mean of its divisors is an integer number (3284388).

Almost surely, 2^61449872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61449872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65687760).

61449872 is an abundant number, since it is smaller than the sum of its proper divisors (69925648).

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

61449872 is a wasteful number, since it uses less digits than its factorization.

61449872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4031 (or 4025 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 61449872 is about 7838.9968746007. The cubic root of 61449872 is about 394.6150648284.

The spelling of 61449872 in words is "sixty-one million, four hundred forty-nine thousand, eight hundred seventy-two".