840250634 has 8 divisors (see below), whose sum is σ = 1268835300. Its totient is φ = 417305536.

The previous prime is 840250633. The next prime is 840250643. The reversal of 840250634 is 436052048.

It can be written as a sum of positive squares in 2 ways, for example, as 840130225 + 120409 = 28985^2 + 347^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×840250634² = 1412042255874803912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 840250634.

It is not an unprimeable number, because it can be changed into a prime (840250633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1409519 + ... + 1410114.

Almost surely, 2^840250634 is an apocalyptic number.

840250634 is a deficient number, since it is larger than the sum of its proper divisors (428584666).

840250634 is a wasteful number, since it uses less digits than its factorization.

840250634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819784.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 840250634 is about 28987.0770171813. The cubic root of 840250634 is about 943.6326291532.

The spelling of 840250634 in words is "eight hundred forty million, two hundred fifty thousand, six hundred thirty-four".