61906830 has 16 divisors (see below), whose sum is σ = 148576464. Its totient is φ = 16508480.

The previous prime is 61906813. The next prime is 61906837. The reversal of 61906830 is 3860916.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61906791 and 61906800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61906837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1031751 + ... + 1031810.

It is an arithmetic number, because the mean of its divisors is an integer number (9286029).

Almost surely, 2^61906830 is an apocalyptic number.

61906830 is an abundant number, since it is smaller than the sum of its proper divisors (86669634).

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

61906830 is a wasteful number, since it uses less digits than its factorization.

61906830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2063571.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 61906830 is about 7868.0893487555. The cubic root of 61906830 is about 395.5908052524.

The spelling of 61906830 in words is "sixty-one million, nine hundred six thousand, eight hundred thirty".