61187958 has 48 divisors (see below), whose sum is σ = 148992480. Its totient is φ = 18006912.

The previous prime is 61187957. The next prime is 61187963. The reversal of 61187958 is 85978116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61187953) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 303 + ... + 11066.

It is an arithmetic number, because the mean of its divisors is an integer number (3104010).

Almost surely, 2^61187958 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61187958, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74496240).

61187958 is an abundant number, since it is smaller than the sum of its proper divisors (87804522).

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

61187958 is a wasteful number, since it uses less digits than its factorization.

61187958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11413 (or 11410 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 61187958 is about 7822.2731990132. The cubic root of 61187958 is about 394.0536185800.

The spelling of 61187958 in words is "sixty-one million, one hundred eighty-seven thousand, nine hundred fifty-eight".