61947620 has 48 divisors (see below), whose sum is σ = 152705280. Its totient is φ = 20663424.

The previous prime is 61947607. The next prime is 61947623. The reversal of 61947620 is 2674916.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (61947623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 800 + ... + 11159.

It is an arithmetic number, because the mean of its divisors is an integer number (3181360).

Almost surely, 2^61947620 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 61947620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76352640).

61947620 is an abundant number, since it is smaller than the sum of its proper divisors (90757660).

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

61947620 is a wasteful number, since it uses less digits than its factorization.

61947620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12012 (or 12010 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 61947620 is about 7870.6810378772. The cubic root of 61947620 is about 395.6776702302.

The spelling of 61947620 in words is "sixty-one million, nine hundred forty-seven thousand, six hundred twenty".