61987424 has 48 divisors (see below), whose sum is σ = 131503680. Its totient is φ = 28667520.

The previous prime is 61987421. The next prime is 61987441. The reversal of 61987424 is 42478916.

61987424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61987421) 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, 24959 + ... + 27329.

It is an arithmetic number, because the mean of its divisors is an integer number (2739660).

Almost surely, 2^61987424 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 61987424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65751840).

61987424 is an abundant number, since it is smaller than the sum of its proper divisors (69516256).

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

61987424 is a wasteful number, since it uses less digits than its factorization.

61987424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2443 (or 2435 counting only the distinct ones).

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

The square root of 61987424 is about 7873.2092567136. The cubic root of 61987424 is about 395.7623987042.

The spelling of 61987424 in words is "sixty-one million, nine hundred eighty-seven thousand, four hundred twenty-four".