1438899870 has 16 divisors (see below), whose sum is σ = 3453359760. Its totient is φ = 383706624.

The previous prime is 1438899857. The next prime is 1438899923. The reversal of 1438899870 is 789988341.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1438899870.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23981635 + ... + 23981694.

It is an arithmetic number, because the mean of its divisors is an integer number (215834985).

Almost surely, 2^1438899870 is an apocalyptic number.

1438899870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1438899870 is an abundant number, since it is smaller than the sum of its proper divisors (2014459890).

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

1438899870 is a wasteful number, since it uses less digits than its factorization.

1438899870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47963339.

The product of its (nonzero) digits is 3483648, while the sum is 57.

The square root of 1438899870 is about 37932.8336668907. The cubic root of 1438899870 is about 1128.9555886245.

The spelling of 1438899870 in words is "one billion, four hundred thirty-eight million, eight hundred ninety-nine thousand, eight hundred seventy".