128787372 has 36 divisors (see below), whose sum is σ = 372053136. Its totient is φ = 36796320.

The previous prime is 128787353. The next prime is 128787391. The reversal of 128787372 is 273787821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (128787353) and next prime (128787391).

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 255279 + ... + 255782.

Almost surely, 2^128787372 is an apocalyptic number.

128787372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128787372 is an abundant number, since it is smaller than the sum of its proper divisors (243265764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128787372 is a wasteful number, since it uses less digits than its factorization.

128787372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511078 (or 511073 counting only the distinct ones).

The product of its digits is 263424, while the sum is 45.

The square root of 128787372 is about 11348.4524055045. The cubic root of 128787372 is about 504.9996693132. Note that the first 3 decimals are identical.

The spelling of 128787372 in words is "one hundred twenty-eight million, seven hundred eighty-seven thousand, three hundred seventy-two".