140640654 has 32 divisors (see below), whose sum is σ = 350689536. Its totient is φ = 36529920.

The previous prime is 140640649. The next prime is 140640667. The reversal of 140640654 is 456046041.

It is a super-3 number, since 3×140640654³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151747 + ... + 152670.

It is an arithmetic number, because the mean of its divisors is an integer number (10959048).

Almost surely, 2^140640654 is an apocalyptic number.

140640654 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

140640654 is an abundant number, since it is smaller than the sum of its proper divisors (210048882).

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

140640654 is a wasteful number, since it uses less digits than its factorization.

140640654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304440.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 140640654 is about 11859.2012378575. The cubic root of 140640654 is about 520.0402508291.

Adding to 140640654 its reverse (456046041), we get a palindrome (596686695).

The spelling of 140640654 in words is "one hundred forty million, six hundred forty thousand, six hundred fifty-four".