146381640 has 32 divisors (see below), whose sum is σ = 439145280. Its totient is φ = 39035072.

The previous prime is 146381629. The next prime is 146381663. The reversal of 146381640 is 46183641.

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 609804 + ... + 610043.

It is an arithmetic number, because the mean of its divisors is an integer number (13723290).

Almost surely, 2^146381640 is an apocalyptic number.

146381640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

146381640 is an abundant number, since it is smaller than the sum of its proper divisors (292763640).

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

146381640 is a wasteful number, since it uses less digits than its factorization.

146381640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219861 (or 1219857 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 146381640 is about 12098.8280424180. The cubic root of 146381640 is about 527.0221513588.

The spelling of 146381640 in words is "one hundred forty-six million, three hundred eighty-one thousand, six hundred forty".