128377845 has 16 divisors (see below), whose sum is σ = 228227520. Its totient is φ = 68468112.

The previous prime is 128377787. The next prime is 128377853. The reversal of 128377845 is 548773821.

It is not a de Polignac number, because 128377845 - 2¹³ = 128369653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 128377845.

It is a congruent number.

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, 475339 + ... + 475608.

It is an arithmetic number, because the mean of its divisors is an integer number (14264220).

Almost surely, 2^128377845 is an apocalyptic number.

128377845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128377845 is a deficient number, since it is larger than the sum of its proper divisors (99849675).

128377845 is an equidigital number, since it uses as much as digits as its factorization.

128377845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950961 (or 950955 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 128377845 is about 11330.3947415790. The cubic root of 128377845 is about 504.4638233032.

The spelling of 128377845 in words is "one hundred twenty-eight million, three hundred seventy-seven thousand, eight hundred forty-five".