128629743 has 8 divisors (see below), whose sum is σ = 187097856. Its totient is φ = 77957400.

The previous prime is 128629693. The next prime is 128629759. The reversal of 128629743 is 347926821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128629743 - 2⁶ = 128629679 is a prime.

It is a super-2 number, since 2×128629743² = 33091221568492098, which contains 22 as substring.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 128629695 and 128629704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128629043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1948903 + ... + 1948968.

It is an arithmetic number, because the mean of its divisors is an integer number (23387232).

Almost surely, 2^128629743 is an apocalyptic number.

128629743 is a deficient number, since it is larger than the sum of its proper divisors (58468113).

128629743 is a wasteful number, since it uses less digits than its factorization.

128629743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3897885.

The product of its digits is 145152, while the sum is 42.

The square root of 128629743 is about 11341.5053233687. The cubic root of 128629743 is about 504.7935541478.

The spelling of 128629743 in words is "one hundred twenty-eight million, six hundred twenty-nine thousand, seven hundred forty-three".