140185990 has 64 divisors (see below), whose sum is σ = 306662400. Its totient is φ = 45069696.

The previous prime is 140185973. The next prime is 140186003. The reversal of 140185990 is 99581041.

It is a super-2 number, since 2×140185990² = 39304223584560200, which contains 22 as substring.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 144487 + ... + 145453.

It is an arithmetic number, because the mean of its divisors is an integer number (4791600).

Almost surely, 2^140185990 is an apocalyptic number.

140185990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

140185990 is an abundant number, since it is smaller than the sum of its proper divisors (166476410).

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

140185990 is a wasteful number, since it uses less digits than its factorization.

140185990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 140185990 is about 11840.0164695831. The cubic root of 140185990 is about 519.4792493818.

The spelling of 140185990 in words is "one hundred forty million, one hundred eighty-five thousand, nine hundred ninety".