128010402 has 80 divisors (see below), whose sum is σ = 311885280. Its totient is φ = 38913264.

The previous prime is 128010397. The next prime is 128010419. The reversal of 128010402 is 204010821.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1542253 + ... + 1542335.

It is an arithmetic number, because the mean of its divisors is an integer number (3898566).

Almost surely, 2^128010402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128010402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155942640).

128010402 is an abundant number, since it is smaller than the sum of its proper divisors (183874878).

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

128010402 is an frugal number, since it uses more digits than its factorization.

128010402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 128010402 is about 11314.1681974416. The cubic root of 128010402 is about 503.9820713577.

The spelling of 128010402 in words is "one hundred twenty-eight million, ten thousand, four hundred two".