1438623825 has 48 divisors (see below), whose sum is σ = 2453104896. Its totient is φ = 743385600.

The previous prime is 1438623787. The next prime is 1438623829. The reversal of 1438623825 is 5283268341.

It is not a de Polignac number, because 1438623825 - 2⁸ = 1438623569 is a prime.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1438623829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 751069 + ... + 752981.

It is an arithmetic number, because the mean of its divisors is an integer number (51106352).

Almost surely, 2^1438623825 is an apocalyptic number.

1438623825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1438623825 is a deficient number, since it is larger than the sum of its proper divisors (1014481071).

1438623825 is a wasteful number, since it uses less digits than its factorization.

1438623825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2234 (or 2229 counting only the distinct ones).

The product of its digits is 276480, while the sum is 42.

The square root of 1438623825 is about 37929.1948899525. The cubic root of 1438623825 is about 1128.8833893740.

The spelling of 1438623825 in words is "one billion, four hundred thirty-eight million, six hundred twenty-three thousand, eight hundred twenty-five".