61395720 has 32 divisors (see below), whose sum is σ = 184187520. Its totient is φ = 16372160.

The previous prime is 61395689. The next prime is 61395727. The reversal of 61395720 is 2759316.

It is not an unprimeable number, because it can be changed into a prime (61395727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255696 + ... + 255935.

It is an arithmetic number, because the mean of its divisors is an integer number (5755860).

Almost surely, 2^61395720 is an apocalyptic number.

61395720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61395720 is an abundant number, since it is smaller than the sum of its proper divisors (122791800).

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

61395720 is a wasteful number, since it uses less digits than its factorization.

61395720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511645 (or 511641 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 61395720 is about 7835.5420999443. The cubic root of 61395720 is about 394.4991140841.

The spelling of 61395720 in words is "sixty-one million, three hundred ninety-five thousand, seven hundred twenty".