61086740 has 144 divisors (see below), whose sum is σ = 159376896. Its totient is φ = 19468800.

The previous prime is 61086737. The next prime is 61086743. The reversal of 61086740 is 4768016.

It is an interprime number because it is at equal distance from previous prime (61086737) and next prime (61086743).

It is a junction number, because it is equal to n+sod(n) for n = 61086697 and 61086706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61086743) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1152554 + ... + 1152606.

It is an arithmetic number, because the mean of its divisors is an integer number (1106784).

Almost surely, 2^61086740 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 61086740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79688448).

61086740 is an abundant number, since it is smaller than the sum of its proper divisors (98290156).

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

61086740 is a wasteful number, since it uses less digits than its factorization.

61086740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 61086740 is about 7815.8006627600. The cubic root of 61086740 is about 393.8362156047.

The spelling of 61086740 in words is "sixty-one million, eighty-six thousand, seven hundred forty".