61049940 has 96 divisors (see below), whose sum is σ = 196971264. Its totient is φ = 13839360.

The previous prime is 61049929. The next prime is 61049999. The reversal of 61049940 is 4994016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57010 + ... + 58070.

It is an arithmetic number, because the mean of its divisors is an integer number (2051784).

Almost surely, 2^61049940 is an apocalyptic number.

61049940 is a gapful number since it is divisible by the number (60) 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 61049940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98485632).

61049940 is an abundant number, since it is smaller than the sum of its proper divisors (135921324).

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

61049940 is a wasteful number, since it uses less digits than its factorization.

61049940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217 (or 1215 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 61049940 is about 7813.4461027129. The cubic root of 61049940 is about 393.7571145099.

The spelling of 61049940 in words is "sixty-one million, forty-nine thousand, nine hundred forty".