61493490 has 96 divisors (see below), whose sum is σ = 169917696. Its totient is φ = 15396480.

The previous prime is 61493473. The next prime is 61493501. The reversal of 61493490 is 9439416.

61493490 is a `hidden beast` number, since 614 + 9 + 34 + 9 + 0 = 666.

61493490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×61493490⁴ (a number of 32 digits) contains 4444 as substring.

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, 126027 + ... + 126513.

It is an arithmetic number, because the mean of its divisors is an integer number (1769976).

Almost surely, 2^61493490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61493490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84958848).

61493490 is an abundant number, since it is smaller than the sum of its proper divisors (108424206).

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

61493490 is a wasteful number, since it uses less digits than its factorization.

61493490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584 (or 581 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 61493490 is about 7841.7784972543. The cubic root of 61493490 is about 394.7084105557.

The spelling of 61493490 in words is "sixty-one million, four hundred ninety-three thousand, four hundred ninety".