140400090 has 36 divisors (see below), whose sum is σ = 365332734. Its totient is φ = 37410048.

The previous prime is 140400083. The next prime is 140400103. The reversal of 140400090 is 90004041.

It can be written as a sum of positive squares in 3 ways, for example, as 101425041 + 38975049 = 10071^2 + 6243^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 111786 + ... + 113034.

Almost surely, 2^140400090 is an apocalyptic number.

140400090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

140400090 is an abundant number, since it is smaller than the sum of its proper divisors (224932644).

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

140400090 is an equidigital number, since it uses as much as digits as its factorization.

140400090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2511 (or 1259 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 140400090 is about 11849.0543926509. The cubic root of 140400090 is about 519.7435742608.

The spelling of 140400090 in words is "one hundred forty million, four hundred thousand, ninety".