140391936 has 60 divisors (see below), whose sum is σ = 405193932. Its totient is φ = 46795776.

The previous prime is 140391887. The next prime is 140391959. The reversal of 140391936 is 639193041.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 140391936.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10626 + ... + 19841.

Almost surely, 2^140391936 is an apocalyptic number.

140391936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

140391936 is an abundant number, since it is smaller than the sum of its proper divisors (264801996).

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

140391936 is an equidigital number, since it uses as much as digits as its factorization.

140391936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30491 (or 30472 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 140391936 is about 11848.7103095653. The cubic root of 140391936 is about 519.7335123699.

It can be divided in two parts, 1403 and 91936, that added together give a palindrome (93339).

The spelling of 140391936 in words is "one hundred forty million, three hundred ninety-one thousand, nine hundred thirty-six".