84744890 has 16 divisors (see below), whose sum is σ = 154690560. Its totient is φ = 33420240.

The previous prime is 84744887. The next prime is 84744899. The reversal of 84744890 is 9844748.

It is a super-2 number, since 2×84744890² = 14363392762224200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84744899) by changing a digit.

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, 58970 + ... + 60389.

It is an arithmetic number, because the mean of its divisors is an integer number (9668160).

Almost surely, 2^84744890 is an apocalyptic number.

84744890 is a deficient number, since it is larger than the sum of its proper divisors (69945670).

84744890 is a wasteful number, since it uses less digits than its factorization.

84744890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119437.

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 84744890 is about 9205.6987784741. The cubic root of 84744890 is about 439.2426537838.

The spelling of 84744890 in words is "eighty-four million, seven hundred forty-four thousand, eight hundred ninety".