128261022 has 16 divisors (see below), whose sum is σ = 271611792. Its totient is φ = 40238720.

The previous prime is 128261017. The next prime is 128261027. The reversal of 128261022 is 220162821.

It is an interprime number because it is at equal distance from previous prime (128261017) and next prime (128261027).

It is a junction number, because it is equal to n+sod(n) for n = 128260983 and 128261001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128261027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 628629 + ... + 628832.

It is an arithmetic number, because the mean of its divisors is an integer number (16975737).

Almost surely, 2^128261022 is an apocalyptic number.

128261022 is an abundant number, since it is smaller than the sum of its proper divisors (143350770).

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

128261022 is a wasteful number, since it uses less digits than its factorization.

128261022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257483.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 128261022 is about 11325.2382756391. The cubic root of 128261022 is about 504.3107572699.

The spelling of 128261022 in words is "one hundred twenty-eight million, two hundred sixty-one thousand, twenty-two".