128777104 has 15 divisors (see below), whose sum is σ = 249593617. Its totient is φ = 64365856.

The previous prime is 128777101. The next prime is 128777107. The reversal of 128777104 is 401777821.

The square root of 128777104 is 11348.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (128777101) and next prime (128777107).

It can be written as a sum of positive squares in only one way, i.e., 4410000 + 124367104 = 2100^2 + 11152^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128777101) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 43974 + ... + 46810.

Almost surely, 2^128777104 is an apocalyptic number.

128777104 is the 11348-th square number.

It is an amenable number.

128777104 is a deficient number, since it is larger than the sum of its proper divisors (120816513).

128777104 is an frugal number, since it uses more digits than its factorization.

128777104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5682 (or 2839 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 37.

The cubic root of 128777104 is about 504.9862480325.

It can be divided in two parts, 128777 and 104, that added together give a square (128881 = 359²).

The spelling of 128777104 in words is "one hundred twenty-eight million, seven hundred seventy-seven thousand, one hundred four".