128472788 has 6 divisors (see below), whose sum is σ = 224827386. Its totient is φ = 64236392.

The previous prime is 128472787. The next prime is 128472797. The reversal of 128472788 is 887274821.

It can be written as a sum of positive squares in only one way, i.e., 128414224 + 58564 = 11332^2 + 242^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128472787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16059095 + ... + 16059102.

It is an arithmetic number, because the mean of its divisors is an integer number (37471231).

Almost surely, 2^128472788 is an apocalyptic number.

It is an amenable number.

128472788 is a deficient number, since it is larger than the sum of its proper divisors (96354598).

128472788 is a wasteful number, since it uses less digits than its factorization.

128472788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32118201 (or 32118199 counting only the distinct ones).

The product of its digits is 401408, while the sum is 47.

The square root of 128472788 is about 11334.5837153378. The cubic root of 128472788 is about 504.5881529243.

The spelling of 128472788 in words is "one hundred twenty-eight million, four hundred seventy-two thousand, seven hundred eighty-eight".