61847940 has 144 divisors (see below), whose sum is σ = 217719936. Its totient is φ = 12840960.

The previous prime is 61847927. The next prime is 61847957. The reversal of 61847940 is 4974816.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50212 + ... + 51428.

It is an arithmetic number, because the mean of its divisors is an integer number (1511944).

Almost surely, 2^61847940 is an apocalyptic number.

61847940 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 61847940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108859968).

61847940 is an abundant number, since it is smaller than the sum of its proper divisors (155871996).

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

61847940 is a wasteful number, since it uses less digits than its factorization.

61847940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258 (or 1245 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 61847940 is about 7864.3461266656. The cubic root of 61847940 is about 395.4653278027.

The spelling of 61847940 in words is "sixty-one million, eight hundred forty-seven thousand, nine hundred forty".