61890894 has 48 divisors (see below), whose sum is σ = 147957264. Its totient is φ = 18576000.

The previous prime is 61890887. The next prime is 61890943. The reversal of 61890894 is 49809816.

It is a congruent number.

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, 6369 + ... + 12819.

It is an arithmetic number, because the mean of its divisors is an integer number (3082443).

Almost surely, 2^61890894 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61890894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73978632).

61890894 is an abundant number, since it is smaller than the sum of its proper divisors (86066370).

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

61890894 is a wasteful number, since it uses less digits than its factorization.

61890894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6513 (or 6510 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 61890894 is about 7867.0765853651. The cubic root of 61890894 is about 395.5568581307.

The spelling of 61890894 in words is "sixty-one million, eight hundred ninety thousand, eight hundred ninety-four".