61890464 has 12 divisors (see below), whose sum is σ = 121846914. Its totient is φ = 30945216.

The previous prime is 61890463. The next prime is 61890497. The reversal of 61890464 is 46409816.

61890464 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 42354064 + 19536400 = 6508^2 + 4420^2 .

It is not an unprimeable number, because it can be changed into a prime (61890461) by changing a digit.

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 as a sum of consecutive naturals, namely, 967007 + ... + 967070.

Almost surely, 2^61890464 is an apocalyptic number.

It is an amenable number.

61890464 is a deficient number, since it is larger than the sum of its proper divisors (59956450).

61890464 is a wasteful number, since it uses less digits than its factorization.

61890464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1934087 (or 1934079 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 61890464 is about 7867.0492562332. The cubic root of 61890464 is about 395.5559420571. Note that the first 3 decimals are identical.

The spelling of 61890464 in words is "sixty-one million, eight hundred ninety thousand, four hundred sixty-four".