61861030 has 96 divisors (see below), whose sum is σ = 147744000. Its totient is φ = 18406080.

The previous prime is 61861013. The next prime is 61861043. The reversal of 61861030 is 3016816.

It is a junction number, because it is equal to n+sod(n) for n = 61860986 and 61861004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 123721 + ... + 124219.

It is an arithmetic number, because the mean of its divisors is an integer number (1539000).

Almost surely, 2^61861030 is an apocalyptic number.

61861030 is an abundant number, since it is smaller than the sum of its proper divisors (85882970).

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

61861030 is a wasteful number, since it uses less digits than its factorization.

61861030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 61861030 is about 7865.1783196568. The cubic root of 61861030 is about 395.4932256652.

Adding to 61861030 its reverse (3016816), we get a palindrome (64877846).

The spelling of 61861030 in words is "sixty-one million, eight hundred sixty-one thousand, thirty".