1621714238 has 16 divisors (see below), whose sum is σ = 2492709120. Its totient is φ = 791021400.

The previous prime is 1621714231. The next prime is 1621714243. The reversal of 1621714238 is 8324171261.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1621714198 and 1621714207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621714231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36998 + ... + 67913.

It is an arithmetic number, because the mean of its divisors is an integer number (155794320).

Almost surely, 2^1621714238 is an apocalyptic number.

1621714238 is a deficient number, since it is larger than the sum of its proper divisors (870994882).

1621714238 is a wasteful number, since it uses less digits than its factorization.

1621714238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105103.

The product of its digits is 16128, while the sum is 35.

The square root of 1621714238 is about 40270.5132572208. The cubic root of 1621714238 is about 1174.8744064945.

Adding to 1621714238 its reverse (8324171261), we get a palindrome (9945885499).

The spelling of 1621714238 in words is "one billion, six hundred twenty-one million, seven hundred fourteen thousand, two hundred thirty-eight".