128914690 has 8 divisors (see below), whose sum is σ = 232046460. Its totient is φ = 51565872.

The previous prime is 128914679. The next prime is 128914691. The reversal of 128914690 is 96419821.

It can be written as a sum of positive squares in 2 ways, for example, as 122345721 + 6568969 = 11061^2 + 2563^2 .

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

It is a super-2 number, since 2×128914690² = 33237994595592200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128914691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6445725 + ... + 6445744.

Almost surely, 2^128914690 is an apocalyptic number.

128914690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128914690 is a deficient number, since it is larger than the sum of its proper divisors (103131770).

128914690 is a wasteful number, since it uses less digits than its factorization.

128914690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12891476.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 128914690 is about 11354.0605071490. The cubic root of 128914690 is about 505.1660271665.

The spelling of 128914690 in words is "one hundred twenty-eight million, nine hundred fourteen thousand, six hundred ninety".