67489644 has 12 divisors (see below), whose sum is σ = 157475864. Its totient is φ = 22496544.

The previous prime is 67489637. The next prime is 67489657. The reversal of 67489644 is 44698476.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 67489593 and 67489602.

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 3 ways as a sum of consecutive naturals, for example, 2812057 + ... + 2812080.

Almost surely, 2^67489644 is an apocalyptic number.

It is an amenable number.

67489644 is an abundant number, since it is smaller than the sum of its proper divisors (89986220).

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

67489644 is a wasteful number, since it uses less digits than its factorization.

67489644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5624144 (or 5624142 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 48.

The square root of 67489644 is about 8215.2080923127. The cubic root of 67489644 is about 407.1418188251.

The spelling of 67489644 in words is "sixty-seven million, four hundred eighty-nine thousand, six hundred forty-four".