61928550 has 84 divisors (see below), whose sum is σ = 172803300. Its totient is φ = 16504560.

The previous prime is 61928513. The next prime is 61928579. The reversal of 61928550 is 5582916.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 35601 + ... + 37299.

Almost surely, 2^61928550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61928550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86401650).

61928550 is an abundant number, since it is smaller than the sum of its proper divisors (110874750).

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

61928550 is a wasteful number, since it uses less digits than its factorization.

61928550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729 (or 1709 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 61928550 is about 7869.4694865664. The cubic root of 61928550 is about 395.6370641635.

The spelling of 61928550 in words is "sixty-one million, nine hundred twenty-eight thousand, five hundred fifty".