61068840 has 64 divisors (see below), whose sum is σ = 209381760. Its totient is φ = 13958400.

The previous prime is 61068823. The next prime is 61068883. The reversal of 61068840 is 4886016.

61068840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35511 + ... + 37190.

It is an arithmetic number, because the mean of its divisors is an integer number (3271590).

Almost surely, 2^61068840 is an apocalyptic number.

61068840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61068840 is an abundant number, since it is smaller than the sum of its proper divisors (148312920).

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

61068840 is a wasteful number, since it uses less digits than its factorization.

61068840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72722 (or 72718 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 61068840 is about 7814.6554626548. The cubic root of 61068840 is about 393.7977437697.

The spelling of 61068840 in words is "sixty-one million, sixty-eight thousand, eight hundred forty".