61306806 has 32 divisors (see below), whose sum is σ = 140803200. Its totient is φ = 17599680.

The previous prime is 61306801. The next prime is 61306831. The reversal of 61306806 is 60860316.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61306801) 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, 23191 + ... + 25698.

It is an arithmetic number, because the mean of its divisors is an integer number (4400100).

Almost surely, 2^61306806 is an apocalyptic number.

61306806 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

61306806 is an abundant number, since it is smaller than the sum of its proper divisors (79496394).

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

61306806 is a wasteful number, since it uses less digits than its factorization.

61306806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48924.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 61306806 is about 7829.8662823831. The cubic root of 61306806 is about 394.3085826671.

The spelling of 61306806 in words is "sixty-one million, three hundred six thousand, eight hundred six".