61912480 has 144 divisors (see below), whose sum is σ = 174522600. Its totient is φ = 20686848.

The previous prime is 61912463. The next prime is 61912511. The reversal of 61912480 is 8421916.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 44036496 + 17875984 = 6636^2 + 4228^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 415446 + ... + 415594.

Almost surely, 2^61912480 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 61912480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87261300).

61912480 is an abundant number, since it is smaller than the sum of its proper divisors (112610120).

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

61912480 is a wasteful number, since it uses less digits than its factorization.

61912480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 61912480 is about 7868.4483858001. The cubic root of 61912480 is about 395.6028395738.

The spelling of 61912480 in words is "sixty-one million, nine hundred twelve thousand, four hundred eighty".