128039465 has 8 divisors (see below), whose sum is σ = 154055040. Its totient is φ = 102159792.

The previous prime is 128039449. The next prime is 128039473. The reversal of 128039465 is 564930821.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 128039465 - 2⁴ = 128039449 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31889 + ... + 35678.

It is an arithmetic number, because the mean of its divisors is an integer number (19256880).

Almost surely, 2^128039465 is an apocalyptic number.

It is an amenable number.

128039465 is a deficient number, since it is larger than the sum of its proper divisors (26015575).

128039465 is an equidigital number, since it uses as much as digits as its factorization.

128039465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67951.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 128039465 is about 11315.4524876383. The cubic root of 128039465 is about 504.0202092027.

The spelling of 128039465 in words is "one hundred twenty-eight million, thirty-nine thousand, four hundred sixty-five".