61894784 has 64 divisors (see below), whose sum is σ = 144807360. Its totient is φ = 25795584.

The previous prime is 61894741. The next prime is 61894823. The reversal of 61894784 is 48749816.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32219 + ... + 34085.

It is an arithmetic number, because the mean of its divisors is an integer number (2262615).

Almost surely, 2^61894784 is an apocalyptic number.

61894784 is a gapful number since it is divisible by the number (64) 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 61894784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72403680).

61894784 is an abundant number, since it is smaller than the sum of its proper divisors (82912576).

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

61894784 is a wasteful number, since it uses less digits than its factorization.

61894784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1925 (or 1913 counting only the distinct ones).

The product of its digits is 387072, while the sum is 47.

The square root of 61894784 is about 7867.3238143603. The cubic root of 61894784 is about 395.5651452084.

The spelling of 61894784 in words is "sixty-one million, eight hundred ninety-four thousand, seven hundred eighty-four".