8491490 has 64 divisors (see below), whose sum is σ = 18662400. Its totient is φ = 2720256.

The previous prime is 8491487. The next prime is 8491507. The reversal of 8491490 is 941948.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8491490.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95366 + ... + 95454.

It is an arithmetic number, because the mean of its divisors is an integer number (291600).

Almost surely, 2^8491490 is an apocalyptic number.

8491490 is an abundant number, since it is smaller than the sum of its proper divisors (10170910).

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

8491490 is a wasteful number, since it uses less digits than its factorization.

8491490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 8491490 is about 2914.0161289876. The cubic root of 8491490 is about 204.0146247365.

It can be divided in two parts, 84 and 91490, that multiplied together give a triangular number (7685160 = T₃₉₂₀).

The spelling of 8491490 in words is "eight million, four hundred ninety-one thousand, four hundred ninety".