1238738730 has 16 divisors (see below), whose sum is σ = 2972973024. Its totient is φ = 330330320.

The previous prime is 1238738707. The next prime is 1238738731. The reversal of 1238738730 is 378378321.

It is not an unprimeable number, because it can be changed into a prime (1238738731) 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, 20645616 + ... + 20645675.

It is an arithmetic number, because the mean of its divisors is an integer number (185810814).

Almost surely, 2^1238738730 is an apocalyptic number.

1238738730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1238738730 is an abundant number, since it is smaller than the sum of its proper divisors (1734234294).

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

1238738730 is a wasteful number, since it uses less digits than its factorization.

1238738730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41291301.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 1238738730 is about 35195.7203364273. The cubic root of 1238738730 is about 1073.9726922789.

The spelling of 1238738730 in words is "one billion, two hundred thirty-eight million, seven hundred thirty-eight thousand, seven hundred thirty".