128040715 has 16 divisors (see below), whose sum is σ = 176440320. Its totient is φ = 88218720.

The previous prime is 128040709. The next prime is 128040749. The reversal of 128040715 is 517040821.

It is not a de Polignac number, because 128040715 - 2¹¹ = 128038667 is a prime.

It is a super-2 number, since 2×128040715² = 32788849395422450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60219 + ... + 62308.

It is an arithmetic number, because the mean of its divisors is an integer number (11027520).

Almost surely, 2^128040715 is an apocalyptic number.

128040715 is a deficient number, since it is larger than the sum of its proper divisors (48399605).

128040715 is a wasteful number, since it uses less digits than its factorization.

128040715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122562.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 128040715 is about 11315.5077217065. The cubic root of 128040715 is about 504.0218493824.

The spelling of 128040715 in words is "one hundred twenty-eight million, forty thousand, seven hundred fifteen".