128308401 has 32 divisors (see below), whose sum is σ = 216760320. Its totient is φ = 74310912.

The previous prime is 128308381. The next prime is 128308409. The reversal of 128308401 is 104803821.

It is not a de Polignac number, because 128308401 - 2¹³ = 128300209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (128308409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4785 + ... + 16718.

It is an arithmetic number, because the mean of its divisors is an integer number (6773760).

Almost surely, 2^128308401 is an apocalyptic number.

It is an amenable number.

128308401 is a deficient number, since it is larger than the sum of its proper divisors (88451919).

128308401 is a wasteful number, since it uses less digits than its factorization.

128308401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21542 (or 21536 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 128308401 is about 11327.3298265743. The cubic root of 128308401 is about 504.3728462754.

The spelling of 128308401 in words is "one hundred twenty-eight million, three hundred eight thousand, four hundred one".