61219368 has 128 divisors (see below), whose sum is σ = 204672000. Its totient is φ = 16562880.

The previous prime is 61219351. The next prime is 61219369. The reversal of 61219368 is 86391216.

61219368 is a `hidden beast` number, since 612 + 1 + 9 + 36 + 8 = 666.

It is a super-2 number, since 2×61219368² = 7495622036638848, which contains 22 as substring.

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

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (61219369) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27663 + ... + 29793.

It is an arithmetic number, because the mean of its divisors is an integer number (1599000).

Almost surely, 2^61219368 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 61219368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102336000).

61219368 is an abundant number, since it is smaller than the sum of its proper divisors (143452632).

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

61219368 is a wasteful number, since it uses less digits than its factorization.

61219368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2172 (or 2162 counting only the distinct ones).

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

The square root of 61219368 is about 7824.2806698124. The cubic root of 61219368 is about 394.1210343879.

The spelling of 61219368 in words is "sixty-one million, two hundred nineteen thousand, three hundred sixty-eight".