128440070 has 16 divisors (see below), whose sum is σ = 252209808. Its totient is φ = 46705440.

The previous prime is 128440063. The next prime is 128440079. The reversal of 128440070 is 70044821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128440079) 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, 583709 + ... + 583928.

It is an arithmetic number, because the mean of its divisors is an integer number (15763113).

Almost surely, 2^128440070 is an apocalyptic number.

128440070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128440070 is a deficient number, since it is larger than the sum of its proper divisors (123769738).

128440070 is a wasteful number, since it uses less digits than its factorization.

128440070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167655.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 128440070 is about 11333.1403414941. The cubic root of 128440070 is about 504.5453150152.

Adding to 128440070 its reverse (70044821), we get a palindrome (198484891).

The spelling of 128440070 in words is "one hundred twenty-eight million, four hundred forty thousand, seventy".