61228386 has 40 divisors (see below), whose sum is σ = 138160704. Its totient is φ = 20266200.

The previous prime is 61228381. The next prime is 61228399. The reversal of 61228386 is 68382216.

61228386 is a `hidden beast` number, since 612 + 2 + 8 + 38 + 6 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61228386.

It is not an unprimeable number, because it can be changed into a prime (61228381) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23211 + ... + 25713.

Almost surely, 2^61228386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61228386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69080352).

61228386 is an abundant number, since it is smaller than the sum of its proper divisors (76932318).

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

61228386 is a wasteful number, since it uses less digits than its factorization.

61228386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668 (or 2659 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 61228386 is about 7824.8569315995. The cubic root of 61228386 is about 394.1403856112.

The spelling of 61228386 in words is "sixty-one million, two hundred twenty-eight thousand, three hundred eighty-six".