61998340 has 48 divisors (see below), whose sum is σ = 138475008. Its totient is φ = 23264384.

The previous prime is 61998329. The next prime is 61998359. The reversal of 61998340 is 4389916.

It is a junction number, because it is equal to n+sod(n) for n = 61998293 and 61998302.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23109 + ... + 25651.

It is an arithmetic number, because the mean of its divisors is an integer number (2884896).

Almost surely, 2^61998340 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 61998340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69237504).

61998340 is an abundant number, since it is smaller than the sum of its proper divisors (76476668).

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

61998340 is a wasteful number, since it uses less digits than its factorization.

61998340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2628 (or 2626 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 61998340 is about 7873.9024632008. The cubic root of 61998340 is about 395.7856286246.

The spelling of 61998340 in words is "sixty-one million, nine hundred ninety-eight thousand, three hundred forty".