128279914490 has 32 divisors (see below), whose sum is σ = 284189351040. Its totient is φ = 40598478144.

The previous prime is 128279914447. The next prime is 128279914507. The reversal of 128279914490 is 94419972821.

It is a super-4 number, since 4×128279914490⁴ (a number of 46 digits) contains 4444 as substring.

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, 70482560 + ... + 70484379.

It is an arithmetic number, because the mean of its divisors is an integer number (8880917220).

Almost surely, 2^128279914490 is an apocalyptic number.

128279914490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128279914490 is an abundant number, since it is smaller than the sum of its proper divisors (155909436550).

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

128279914490 is a wasteful number, since it uses less digits than its factorization.

128279914490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140966966.

The product of its (nonzero) digits is 2612736, while the sum is 56.

The spelling of 128279914490 in words is "one hundred twenty-eight billion, two hundred seventy-nine million, nine hundred fourteen thousand, four hundred ninety".