128015783 has 12 divisors (see below), whose sum is σ = 150396552. Its totient is φ = 108637200.

The previous prime is 128015753. The next prime is 128015801. The reversal of 128015783 is 387510821.

It is not a de Polignac number, because 128015783 - 2¹⁶ = 127950247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128015743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7985 + ... + 17882.

It is an arithmetic number, because the mean of its divisors is an integer number (12533046).

Almost surely, 2^128015783 is an apocalyptic number.

128015783 is a deficient number, since it is larger than the sum of its proper divisors (22380769).

128015783 is a wasteful number, since it uses less digits than its factorization.

128015783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25982 (or 25975 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 128015783 is about 11314.4059941298. The cubic root of 128015783 is about 503.9891329961.

The spelling of 128015783 in words is "one hundred twenty-eight million, fifteen thousand, seven hundred eighty-three".