61990950 has 96 divisors (see below), whose sum is σ = 179917056. Its totient is φ = 13829760.

The previous prime is 61990949. The next prime is 61990961. The reversal of 61990950 is 5909916.

61990950 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 61990899 and 61990908.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44464 + ... + 45836.

It is an arithmetic number, because the mean of its divisors is an integer number (1874136).

Almost surely, 2^61990950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61990950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89958528).

61990950 is an abundant number, since it is smaller than the sum of its proper divisors (117926106).

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

61990950 is a wasteful number, since it uses less digits than its factorization.

61990950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1438 (or 1433 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 39.

The square root of 61990950 is about 7873.4331774646. The cubic root of 61990950 is about 395.7699025476.

The spelling of 61990950 in words is "sixty-one million, nine hundred ninety thousand, nine hundred fifty".