672989420 has 24 divisors (see below), whose sum is σ = 1416668400. Its totient is φ = 268549952.

The previous prime is 672989417. The next prime is 672989423. The reversal of 672989420 is 24989276.

It is an interprime number because it is at equal distance from previous prime (672989417) and next prime (672989423).

It is not an unprimeable number, because it can be changed into a prime (672989423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31775 + ... + 48534.

It is an arithmetic number, because the mean of its divisors is an integer number (59027850).

Almost surely, 2^672989420 is an apocalyptic number.

It is an amenable number.

672989420 is an abundant number, since it is smaller than the sum of its proper divisors (743678980).

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

672989420 is a wasteful number, since it uses less digits than its factorization.

672989420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80737 (or 80735 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 672989420 is about 25942.0396268297. The cubic root of 672989420 is about 876.3334965201. Note that the first 3 decimals are identical.

The spelling of 672989420 in words is "six hundred seventy-two million, nine hundred eighty-nine thousand, four hundred twenty".