1438945632 has 72 divisors (see below), whose sum is σ = 4148117064. Its totient is φ = 473071104.

The previous prime is 1438945609. The next prime is 1438945649. The reversal of 1438945632 is 2365498341.

1438945632 is a `hidden beast` number, since 1 + 4 + 3 + 8 + 9 + 4 + 5 + 632 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13198 + ... + 55245.

It is an arithmetic number, because the mean of its divisors is an integer number (57612737).

Almost surely, 2^1438945632 is an apocalyptic number.

1438945632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1438945632 is an abundant number, since it is smaller than the sum of its proper divisors (2709171432).

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

1438945632 is a wasteful number, since it uses less digits than its factorization.

1438945632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68532 (or 68521 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 1438945632 is about 37933.4368598470. The cubic root of 1438945632 is about 1128.9675567304.

The spelling of 1438945632 in words is "one billion, four hundred thirty-eight million, nine hundred forty-five thousand, six hundred thirty-two".