840090884 has 6 divisors (see below), whose sum is σ = 1470159054. Its totient is φ = 420045440.

The previous prime is 840090869. The next prime is 840090913. The reversal of 840090884 is 488090048.

It can be written as a sum of positive squares in only one way, i.e., 566916100 + 273174784 = 23810^2 + 16528^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105011357 + ... + 105011364.

It is an arithmetic number, because the mean of its divisors is an integer number (245026509).

Almost surely, 2^840090884 is an apocalyptic number.

It is an amenable number.

840090884 is a deficient number, since it is larger than the sum of its proper divisors (630068170).

840090884 is a wasteful number, since it uses less digits than its factorization.

840090884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210022725 (or 210022723 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 840090884 is about 28984.3213479288. The cubic root of 840090884 is about 943.5728236377.

The spelling of 840090884 in words is "eight hundred forty million, ninety thousand, eight hundred eighty-four".