1438729551 has 24 divisors (see below), whose sum is σ = 2376135840. Its totient is φ = 821753856.

The previous prime is 1438729541. The next prime is 1438729559. The reversal of 1438729551 is 1559278341.

1438729551 is a `hidden beast` number, since 14 + 3 + 87 + 2 + 9 + 551 = 666.

It is not a de Polignac number, because 1438729551 - 2⁵ = 1438729519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1438729497 and 1438729506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438729559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 190911 + ... + 198303.

It is an arithmetic number, because the mean of its divisors is an integer number (99005660).

Almost surely, 2^1438729551 is an apocalyptic number.

1438729551 is a deficient number, since it is larger than the sum of its proper divisors (937406289).

1438729551 is a wasteful number, since it uses less digits than its factorization.

1438729551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10495 (or 10492 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 1438729551 is about 37930.5885928494. The cubic root of 1438729551 is about 1128.9110429782.

The spelling of 1438729551 in words is "one billion, four hundred thirty-eight million, seven hundred twenty-nine thousand, five hundred fifty-one".