84904890 has 32 divisors (see below), whose sum is σ = 232882560. Its totient is φ = 19406784.

The previous prime is 84904873. The next prime is 84904921. The reversal of 84904890 is 9840948.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 201945 + ... + 202364.

It is an arithmetic number, because the mean of its divisors is an integer number (7277580).

Almost surely, 2^84904890 is an apocalyptic number.

84904890 is an abundant number, since it is smaller than the sum of its proper divisors (147977670).

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

84904890 is a wasteful number, since it uses less digits than its factorization.

84904890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404326.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 84904890 is about 9214.3849496317. The cubic root of 84904890 is about 439.5189128860.

The spelling of 84904890 in words is "eighty-four million, nine hundred four thousand, eight hundred ninety".