1616990 has 16 divisors (see below), whose sum is σ = 2942352. Its totient is φ = 639744.

The previous prime is 1616983. The next prime is 1617019. The reversal of 1616990 is 996161.

It is a happy number.

It is a super-2 number, since 2×1616990² = 5229313320200, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 137 + ... + 1803.

It is an arithmetic number, because the mean of its divisors is an integer number (183897).

2^1616990 is an apocalyptic number.

1616990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1616990 is a deficient number, since it is larger than the sum of its proper divisors (1325362).

1616990 is a wasteful number, since it uses less digits than its factorization.

1616990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 1616990 is about 1271.6092167014. The cubic root of 1616990 is about 117.3732449307.

The spelling of 1616990 in words is "one million, six hundred sixteen thousand, nine hundred ninety".