1672421238 has 24 divisors (see below), whose sum is σ = 3721515408. Its totient is φ = 542406672.

The previous prime is 1672421227. The next prime is 1672421269. The reversal of 1672421238 is 8321242761.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1254906 + ... + 1256237.

It is an arithmetic number, because the mean of its divisors is an integer number (155063142).

Almost surely, 2^1672421238 is an apocalyptic number.

1672421238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1672421238 is an abundant number, since it is smaller than the sum of its proper divisors (2049094170).

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

1672421238 is a wasteful number, since it uses less digits than its factorization.

1672421238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2511188 (or 2511185 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 1672421238 is about 40895.2471321546. The cubic root of 1672421238 is about 1186.9940937607.

Adding to 1672421238 its reverse (8321242761), we get a palindrome (9993663999).

The spelling of 1672421238 in words is "one billion, six hundred seventy-two million, four hundred twenty-one thousand, two hundred thirty-eight".