61487424 has 140 divisors (see below), whose sum is σ = 189014100. Its totient is φ = 19740672.

The previous prime is 61487423. The next prime is 61487429. The reversal of 61487424 is 42478416.

It can be written as a sum of positive squares in 2 ways, for example, as 45805824 + 15681600 = 6768^2 + 3960^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61487423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 150132 + ... + 150540.

Almost surely, 2^61487424 is an apocalyptic number.

61487424 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61487424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94507050).

61487424 is an abundant number, since it is smaller than the sum of its proper divisors (127526676).

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

61487424 is a wasteful number, since it uses less digits than its factorization.

61487424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462 (or 443 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 61487424 is about 7841.3917132101. The cubic root of 61487424 is about 394.6954315127.

Subtracting from 61487424 its product of digits (43008), we obtain a palindrome (61444416).

The spelling of 61487424 in words is "sixty-one million, four hundred eighty-seven thousand, four hundred twenty-four".