61885458 has 40 divisors (see below), whose sum is σ = 140595708. Its totient is φ = 20342016.

The previous prime is 61885379. The next prime is 61885459. The reversal of 61885458 is 85458816.

It can be written as a sum of positive squares in 2 ways, for example, as 55398249 + 6487209 = 7443^2 + 2547^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61885459) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9210 + ... + 14442.

Almost surely, 2^61885458 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61885458, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70297854).

61885458 is an abundant number, since it is smaller than the sum of its proper divisors (78710250).

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

61885458 is a wasteful number, since it uses less digits than its factorization.

61885458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5320 (or 5311 counting only the distinct ones).

The product of its digits is 307200, while the sum is 45.

The square root of 61885458 is about 7866.7310873068. The cubic root of 61885458 is about 395.5452769437.

The spelling of 61885458 in words is "sixty-one million, eight hundred eighty-five thousand, four hundred fifty-eight".