61940340 has 288 divisors, whose sum is σ = 242161920. Its totient is φ = 12441600.

The previous prime is 61940321. The next prime is 61940353. The reversal of 61940340 is 4304916.

61940340 is a `hidden beast` number, since 619 + 4 + 0 + 3 + 40 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 568206 + ... + 568314.

It is an arithmetic number, because the mean of its divisors is an integer number (840840).

Almost surely, 2^61940340 is an apocalyptic number.

61940340 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 61940340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121080960).

61940340 is an abundant number, since it is smaller than the sum of its proper divisors (180221580).

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

61940340 is a wasteful number, since it uses less digits than its factorization.

61940340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 61940340 is about 7870.2185484267. The cubic root of 61940340 is about 395.6621697892.

The spelling of 61940340 in words is "sixty-one million, nine hundred forty thousand, three hundred forty".