1438715730 has 16 divisors (see below), whose sum is σ = 3452917824. Its totient is φ = 383657520.

The previous prime is 1438715699. The next prime is 1438715749. The reversal of 1438715730 is 375178341.

It is a Curzon 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, 23978566 + ... + 23978625.

It is an arithmetic number, because the mean of its divisors is an integer number (215807364).

Almost surely, 2^1438715730 is an apocalyptic number.

1438715730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1438715730 is an abundant number, since it is smaller than the sum of its proper divisors (2014202094).

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

1438715730 is a wasteful number, since it uses less digits than its factorization.

1438715730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47957201.

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 1438715730 is about 37930.4064043611. The cubic root of 1438715730 is about 1128.9074280459.

The spelling of 1438715730 in words is "one billion, four hundred thirty-eight million, seven hundred fifteen thousand, seven hundred thirty".