61678224 has 60 divisors (see below), whose sum is σ = 174270096. Its totient is φ = 20362176.

The previous prime is 61678219. The next prime is 61678229. The reversal of 61678224 is 42287616.

It is an interprime number because it is at equal distance from previous prime (61678219) and next prime (61678229).

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

It is not an unprimeable number, because it can be changed into a prime (61678229) 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 11 ways as a sum of consecutive naturals, for example, 13407 + ... + 17409.

Almost surely, 2^61678224 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 61678224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87135048).

61678224 is an abundant number, since it is smaller than the sum of its proper divisors (112591872).

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

61678224 is a wasteful number, since it uses less digits than its factorization.

61678224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4124 (or 4115 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 61678224 is about 7853.5484973355. The cubic root of 61678224 is about 395.1032662760.

The spelling of 61678224 in words is "sixty-one million, six hundred seventy-eight thousand, two hundred twenty-four".