840542930 has 32 divisors (see below), whose sum is σ = 1554778368. Its totient is φ = 326995200.

The previous prime is 840542903. The next prime is 840542977. The reversal of 840542930 is 39245048.

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, 99575 + ... + 107685.

It is an arithmetic number, because the mean of its divisors is an integer number (48586824).

Almost surely, 2^840542930 is an apocalyptic number.

840542930 is a deficient number, since it is larger than the sum of its proper divisors (714235438).

840542930 is a wasteful number, since it uses less digits than its factorization.

840542930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8402.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 840542930 is about 28992.1184117339. The cubic root of 840542930 is about 943.7420362178.

Adding to 840542930 its reverse (39245048), we get a palindrome (879787978).

The spelling of 840542930 in words is "eight hundred forty million, five hundred forty-two thousand, nine hundred thirty".