128462820 has 48 divisors (see below), whose sum is σ = 375338880. Its totient is φ = 32766976.

The previous prime is 128462771. The next prime is 128462861. The reversal of 128462820 is 28264821.

It is a happy number.

It is a super-2 number, since 2×128462820² = 33005392244704800, which contains 22 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, 45165 + ... + 47924.

It is an arithmetic number, because the mean of its divisors is an integer number (7819560).

Almost surely, 2^128462820 is an apocalyptic number.

128462820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128462820 is an abundant number, since it is smaller than the sum of its proper divisors (246876060).

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

128462820 is a wasteful number, since it uses less digits than its factorization.

128462820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93124 (or 93122 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 128462820 is about 11334.1439906153. The cubic root of 128462820 is about 504.5751025218.

The spelling of 128462820 in words is "one hundred twenty-eight million, four hundred sixty-two thousand, eight hundred twenty".