61128396 has 144 divisors (see below), whose sum is σ = 197084160. Its totient is φ = 15552000.

The previous prime is 61128391. The next prime is 61128401. The reversal of 61128396 is 69382116.

61128396 is a `hidden beast` number, since 611 + 2 + 8 + 39 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (61128391) and next prime (61128401).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 61128396.

It is not an unprimeable number, because it can be changed into a prime (61128391) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 81021 + ... + 81771.

It is an arithmetic number, because the mean of its divisors is an integer number (1368640).

Almost surely, 2^61128396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61128396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98542080).

61128396 is an abundant number, since it is smaller than the sum of its proper divisors (135955764).

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

61128396 is a wasteful number, since it uses less digits than its factorization.

61128396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804 (or 799 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 61128396 is about 7818.4650667506. The cubic root of 61128396 is about 393.9257162816.

The spelling of 61128396 in words is "sixty-one million, one hundred twenty-eight thousand, three hundred ninety-six".