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140309938 = 270154969
BaseRepresentation
bin10000101110011…
…11010110110010
3100210000111001101
420113033112302
5241404404223
621531155014
73322420606
oct1027172662
9323014041
10140309938
1172223a2a
123aba5a6a
13230b8442
14148c5506
15c4b84ad
hex85cf5b2

140309938 has 4 divisors (see below), whose sum is σ = 210464910. Its totient is φ = 70154968.

The previous prime is 140309929. The next prime is 140309951. The reversal of 140309938 is 839903041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 839903041 = 5411552501.

It can be written as a sum of positive squares in only one way, i.e., 131859289 + 8450649 = 11483^2 + 2907^2 .

It is a junction number, because it is equal to n+sod(n) for n = 140309897 and 140309906.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35077483 + ... + 35077486.

Almost surely, 2140309938 is an apocalyptic number.

140309938 is a deficient number, since it is larger than the sum of its proper divisors (70154972).

140309938 is an equidigital number, since it uses as much as digits as its factorization.

140309938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70154971.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 140309938 is about 11845.2495963572. The cubic root of 140309938 is about 519.6323066324.

It can be divided in two parts, 140 and 309938, that added together give a triangular number (310078 = T787).

The spelling of 140309938 in words is "one hundred forty million, three hundred nine thousand, nine hundred thirty-eight".

Divisors: 1 2 70154969 140309938