619140340 has 96 divisors (see below), whose sum is σ = 1694456064. Its totient is φ = 184412160.

The previous prime is 619140331. The next prime is 619140349. The reversal of 619140340 is 43041916.

It is an interprime number because it is at equal distance from previous prime (619140331) and next prime (619140349).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 619140299 and 619140308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (619140349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20935 + ... + 40945.

It is an arithmetic number, because the mean of its divisors is an integer number (17650584).

Almost surely, 2^619140340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 619140340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (847228032).

619140340 is an abundant number, since it is smaller than the sum of its proper divisors (1075315724).

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

619140340 is a wasteful number, since it uses less digits than its factorization.

619140340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20057 (or 20055 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 619140340 is about 24882.5308198342. The cubic root of 619140340 is about 852.3076118923.

The spelling of 619140340 in words is "six hundred nineteen million, one hundred forty thousand, three hundred forty".