61794216 has 144 divisors (see below), whose sum is σ = 189532980. Its totient is φ = 18163200.

The previous prime is 61794209. The next prime is 61794223. The reversal of 61794216 is 61249716.

It is an interprime number because it is at equal distance from previous prime (61794209) and next prime (61794223).

It can be written as a sum of positive squares in 2 ways, for example, as 61685316 + 108900 = 7854^2 + 330^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 357106 + ... + 357278.

Almost surely, 2^61794216 is an apocalyptic number.

61794216 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61794216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94766490).

61794216 is an abundant number, since it is smaller than the sum of its proper divisors (127738764).

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

61794216 is a wasteful number, since it uses less digits than its factorization.

61794216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 230 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 61794216 is about 7860.9297160069. The cubic root of 61794216 is about 395.3507880999.

The spelling of 61794216 in words is "sixty-one million, seven hundred ninety-four thousand, two hundred sixteen".