140281690 has 16 divisors (see below), whose sum is σ = 253240992. Its totient is φ = 55949584.

The previous prime is 140281681. The next prime is 140281733. The reversal of 140281690 is 96182041.

It is a happy number.

It is a super-2 number, since 2×140281690² = 39357905098512200, which contains 22 as substring.

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, 16744 + ... + 23683.

It is an arithmetic number, because the mean of its divisors is an integer number (15827562).

Almost surely, 2^140281690 is an apocalyptic number.

140281690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

140281690 is a deficient number, since it is larger than the sum of its proper divisors (112959302).

140281690 is a wasteful number, since it uses less digits than its factorization.

140281690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40781.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 140281690 is about 11844.0571596054. The cubic root of 140281690 is about 519.5974325083.

The spelling of 140281690 in words is "one hundred forty million, two hundred eighty-one thousand, six hundred ninety".