19486990 has 8 divisors (see below), whose sum is σ = 35076600. Its totient is φ = 7794792.

The previous prime is 19486969. The next prime is 19487011. The reversal of 19486990 is 9968491.

It is an interprime number because it is at equal distance from previous prime (19486969) and next prime (19487011).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 19486990.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 974340 + ... + 974359.

It is an arithmetic number, because the mean of its divisors is an integer number (4384575).

Almost surely, 2^19486990 is an apocalyptic number.

19486990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19486990 is a deficient number, since it is larger than the sum of its proper divisors (15589610).

19486990 is a wasteful number, since it uses less digits than its factorization.

19486990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948706.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 19486990 is about 4414.4070949562. The cubic root of 19486990 is about 269.1007578033.

The spelling of 19486990 in words is "nineteen million, four hundred eighty-six thousand, nine hundred ninety".