842514640 has 40 divisors (see below), whose sum is σ = 2136925728. Its totient is φ = 306368640.

The previous prime is 842514557. The next prime is 842514653. The reversal of 842514640 is 46415248.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×842514640² = 1419661837228659200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 842514596 and 842514605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477822 + ... + 479581.

Almost surely, 2^842514640 is an apocalyptic number.

842514640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

842514640 is an abundant number, since it is smaller than the sum of its proper divisors (1294411088).

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

842514640 is a wasteful number, since it uses less digits than its factorization.

842514640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957427 (or 957421 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 842514640 is about 29026.1027352967. The cubic root of 842514640 is about 944.4793899975.

Adding to 842514640 its reverse (46415248), we get a palindrome (888929888).

The spelling of 842514640 in words is "eight hundred forty-two million, five hundred fourteen thousand, six hundred forty".