616890 has 16 divisors (see below), whose sum is σ = 1480608. Its totient is φ = 164496.

The previous prime is 616877. The next prime is 616897. The reversal of 616890 is 98616.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 20563 = 616890 / (6 + 1 + 6 + 8 + 9 + 0).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (616897) by changing a digit.

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, 10252 + ... + 10311.

It is an arithmetic number, because the mean of its divisors is an integer number (92538).

2⁶¹⁶⁸⁹⁰ is an apocalyptic number.

616890 is an abundant number, since it is smaller than the sum of its proper divisors (863718).

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

616890 is a wasteful number, since it uses less digits than its factorization.

616890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20573.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 616890 is about 785.4234526674. The cubic root of 616890 is about 85.1273753491.

The spelling of 616890 in words is "six hundred sixteen thousand, eight hundred ninety".