140191720 has 16 divisors (see below), whose sum is σ = 315431460. Its totient is φ = 56076672.

The previous prime is 140191687. The next prime is 140191759. The reversal of 140191720 is 27191041.

140191720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 137030436 + 3161284 = 11706^2 + 1778^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1752357 + ... + 1752436.

Almost surely, 2^140191720 is an apocalyptic number.

140191720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140191720 is an abundant number, since it is smaller than the sum of its proper divisors (175239740).

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

140191720 is a wasteful number, since it uses less digits than its factorization.

140191720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3504804 (or 3504800 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 140191720 is about 11840.2584431253. The cubic root of 140191720 is about 519.4863270638.

The spelling of 140191720 in words is "one hundred forty million, one hundred ninety-one thousand, seven hundred twenty".