128416380 has 24 divisors (see below), whose sum is σ = 359566032. Its totient is φ = 34244352.

The previous prime is 128416363. The next prime is 128416411. The reversal of 128416380 is 83614821.

128416380 = 4003² + 4004² + ... + 4010².

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1070077 + ... + 1070196.

It is an arithmetic number, because the mean of its divisors is an integer number (14981918).

Almost surely, 2^128416380 is an apocalyptic number.

128416380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128416380 is an abundant number, since it is smaller than the sum of its proper divisors (231149652).

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

128416380 is a wasteful number, since it uses less digits than its factorization.

128416380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140285 (or 2140283 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 128416380 is about 11332.0951284394. The cubic root of 128416380 is about 504.5142929895.

The spelling of 128416380 in words is "one hundred twenty-eight million, four hundred sixteen thousand, three hundred eighty".