140641690 has 16 divisors (see below), whose sum is σ = 289320192. Its totient is φ = 48219984.

The previous prime is 140641687. The next prime is 140641703. The reversal of 140641690 is 96146041.

It is a super-2 number, since 2×140641690² = 39560169932112200, which contains 22 as substring.

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, 1004514 + ... + 1004653.

It is an arithmetic number, because the mean of its divisors is an integer number (18082512).

Almost surely, 2^140641690 is an apocalyptic number.

140641690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

140641690 is an abundant number, since it is smaller than the sum of its proper divisors (148678502).

140641690 is a wasteful number, since it uses less digits than its factorization.

140641690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009181.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 140641690 is about 11859.2449169414. The cubic root of 140641690 is about 520.0415277486.

The spelling of 140641690 in words is "one hundred forty million, six hundred forty-one thousand, six hundred ninety".