1913220238 has 8 divisors (see below), whose sum is σ = 3020874120. Its totient is φ = 906262200.

The previous prime is 1913220233. The next prime is 1913220259. The reversal of 1913220238 is 8320223191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913220233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25173913 + ... + 25173988.

It is an arithmetic number, because the mean of its divisors is an integer number (377609265).

Almost surely, 2^1913220238 is an apocalyptic number.

1913220238 is a deficient number, since it is larger than the sum of its proper divisors (1107653882).

1913220238 is a wasteful number, since it uses less digits than its factorization.

1913220238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50347922.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1913220238 is about 43740.3730894011. The cubic root of 1913220238 is about 1241.4283397744.

The spelling of 1913220238 in words is "one billion, nine hundred thirteen million, two hundred twenty thousand, two hundred thirty-eight".