61217328 has 20 divisors (see below), whose sum is σ = 158144888. Its totient is φ = 20405760.

The previous prime is 61217327. The next prime is 61217333. The reversal of 61217328 is 82371216.

It is a super-2 number, since 2×61217328² = 7495122494919168, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 61217295 and 61217304.

It is not an unprimeable number, because it can be changed into a prime (61217327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637633 + ... + 637728.

Almost surely, 2^61217328 is an apocalyptic number.

It is an amenable number.

61217328 is an abundant number, since it is smaller than the sum of its proper divisors (96927560).

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

61217328 is a wasteful number, since it uses less digits than its factorization.

61217328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275372 (or 1275366 counting only the distinct ones).

The product of its digits is 4032, while the sum is 30.

The square root of 61217328 is about 7824.1503053047. The cubic root of 61217328 is about 394.1166566021.

The spelling of 61217328 in words is "sixty-one million, two hundred seventeen thousand, three hundred twenty-eight".