140185290 has 32 divisors (see below), whose sum is σ = 384508800. Its totient is φ = 32042304.

The previous prime is 140185271. The next prime is 140185291. The reversal of 140185290 is 92581041.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (140185291) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 333565 + ... + 333984.

It is an arithmetic number, because the mean of its divisors is an integer number (12015900).

Almost surely, 2^140185290 is an apocalyptic number.

140185290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

140185290 is an abundant number, since it is smaller than the sum of its proper divisors (244323510).

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

140185290 is a wasteful number, since it uses less digits than its factorization.

140185290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667566.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 140185290 is about 11839.9869087765. The cubic root of 140185290 is about 519.4783847303.

The spelling of 140185290 in words is "one hundred forty million, one hundred eighty-five thousand, two hundred ninety".