673642420 has 24 divisors (see below), whose sum is σ = 1543254048. Its totient is φ = 244960800.

The previous prime is 673642379. The next prime is 673642439. The reversal of 673642420 is 24246376.

It is a super-2 number, since 2×673642420² = 907588220046912800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1530786 + ... + 1531225.

It is an arithmetic number, because the mean of its divisors is an integer number (64302252).

Almost surely, 2^673642420 is an apocalyptic number.

It is an amenable number.

673642420 is an abundant number, since it is smaller than the sum of its proper divisors (869611628).

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

673642420 is a wasteful number, since it uses less digits than its factorization.

673642420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3062031 (or 3062029 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 34.

The square root of 673642420 is about 25954.6223243568. The cubic root of 673642420 is about 876.6168396521.

Adding to 673642420 its reverse (24246376), we get a palindrome (697888796).

The spelling of 673642420 in words is "six hundred seventy-three million, six hundred forty-two thousand, four hundred twenty".