128378702 has 4 divisors (see below), whose sum is σ = 192568056. Its totient is φ = 64189350.

The previous prime is 128378699. The next prime is 128378711. The reversal of 128378702 is 207873821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 207873821 = 1097 ⋅189493.

It is a super-2 number, since 2×128378702² = 32962182254409608, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32094674 + ... + 32094677.

It is an arithmetic number, because the mean of its divisors is an integer number (48142014).

Almost surely, 2^128378702 is an apocalyptic number.

128378702 is a deficient number, since it is larger than the sum of its proper divisors (64189354).

128378702 is an equidigital number, since it uses as much as digits as its factorization.

128378702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64189353.

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 128378702 is about 11330.4325601453. The cubic root of 128378702 is about 504.4649458347.

The spelling of 128378702 in words is "one hundred twenty-eight million, three hundred seventy-eight thousand, seven hundred two".