619864 has 16 divisors (see below), whose sum is σ = 1328400. Its totient is φ = 265632.

The previous prime is 619849. The next prime is 619867. The reversal of 619864 is 468916.

619864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (619867) by changing a digit.

619864 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5479 + ... + 5590.

It is an arithmetic number, because the mean of its divisors is an integer number (83025).

2⁶¹⁹⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

619864 is an abundant number, since it is smaller than the sum of its proper divisors (708536).

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

619864 is a wasteful number, since it uses less digits than its factorization.

619864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11082 (or 11078 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 619864 is about 787.3144225784. The cubic root of 619864 is about 85.2639545673.

The spelling of 619864 in words is "six hundred nineteen thousand, eight hundred sixty-four".