128295646 has 4 divisors (see below), whose sum is σ = 192443472. Its totient is φ = 64147822.

The previous prime is 128295631. The next prime is 128295649. The reversal of 128295646 is 646592821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 646592821 = 7 ⋅92370403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128295649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32073910 + ... + 32073913.

It is an arithmetic number, because the mean of its divisors is an integer number (48110868).

Almost surely, 2^128295646 is an apocalyptic number.

128295646 is a deficient number, since it is larger than the sum of its proper divisors (64147826).

128295646 is an equidigital number, since it uses as much as digits as its factorization.

128295646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64147825.

The product of its digits is 207360, while the sum is 43.

The square root of 128295646 is about 11326.7667937501. The cubic root of 128295646 is about 504.3561326677.

The spelling of 128295646 in words is "one hundred twenty-eight million, two hundred ninety-five thousand, six hundred forty-six".