1438690626 has 64 divisors (see below), whose sum is σ = 3250800000. Its totient is φ = 471564288.

The previous prime is 1438690613. The next prime is 1438690639. The reversal of 1438690626 is 6260968341.

1438690626 is a `hidden beast` number, since 14 + 3 + 8 + 6 + 9 + 0 + 626 = 666.

It is an interprime number because it is at equal distance from previous prime (1438690613) and next prime (1438690639).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1151250 + ... + 1152498.

It is an arithmetic number, because the mean of its divisors is an integer number (50793750).

Almost surely, 2^1438690626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1438690626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1625400000).

1438690626 is an abundant number, since it is smaller than the sum of its proper divisors (1812109374).

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

1438690626 is a wasteful number, since it uses less digits than its factorization.

1438690626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600 (or 1594 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 1438690626 is about 37930.0754810744. The cubic root of 1438690626 is about 1128.9008619453.

The spelling of 1438690626 in words is "one billion, four hundred thirty-eight million, six hundred ninety thousand, six hundred twenty-six".