61941720 has 64 divisors (see below), whose sum is σ = 191831040. Its totient is φ = 15984000.

The previous prime is 61941707. The next prime is 61941721. The reversal of 61941720 is 2714916.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61941721) 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, 4606 + ... + 12045.

It is an arithmetic number, because the mean of its divisors is an integer number (2997360).

Almost surely, 2^61941720 is an apocalyptic number.

61941720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61941720 is an abundant number, since it is smaller than the sum of its proper divisors (129889320).

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

61941720 is a wasteful number, since it uses less digits than its factorization.

61941720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16696 (or 16692 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 61941720 is about 7870.3062202179. The cubic root of 61941720 is about 395.6651081529.

The spelling of 61941720 in words is "sixty-one million, nine hundred forty-one thousand, seven hundred twenty".