63890649 has 12 divisors (see below), whose sum is σ = 92804400. Its totient is φ = 42354744.

The previous prime is 63890627. The next prime is 63890653. The reversal of 63890649 is 94609836.

63890649 is a `hidden beast` number, since 638 + 9 + 0 + 6 + 4 + 9 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-63890649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63890609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18219 + ... + 21440.

It is an arithmetic number, because the mean of its divisors is an integer number (7733700).

Almost surely, 2^63890649 is an apocalyptic number.

It is an amenable number.

63890649 is a deficient number, since it is larger than the sum of its proper divisors (28913751).

63890649 is a wasteful number, since it uses less digits than its factorization.

63890649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39844 (or 39841 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 63890649 is about 7993.1626406573. The cubic root of 63890649 is about 399.7720555447.

It can be divided in two parts, 6 and 3890649, that added together give a triangular number (3890655 = T₂₇₈₉).

The spelling of 63890649 in words is "sixty-three million, eight hundred ninety thousand, six hundred forty-nine".