140405290 has 32 divisors (see below), whose sum is σ = 257826240. Its totient is φ = 55041024.

The previous prime is 140405173. The next prime is 140405297. The reversal of 140405290 is 92504041.

It is not an unprimeable number, because it can be changed into a prime (140405297) 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, 114762 + ... + 115978.

It is an arithmetic number, because the mean of its divisors is an integer number (8057070).

Almost surely, 2^140405290 is an apocalyptic number.

140405290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

140405290 is a deficient number, since it is larger than the sum of its proper divisors (117420950).

140405290 is a wasteful number, since it uses less digits than its factorization.

140405290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 140405290 is about 11849.2738174118. The cubic root of 140405290 is about 519.7499907648.

The spelling of 140405290 in words is "one hundred forty million, four hundred five thousand, two hundred ninety".