1928398626 has 144 divisors (see below), whose sum is σ = 5416295040. Its totient is φ = 490109760.

The previous prime is 1928398609. The next prime is 1928398627. The reversal of 1928398626 is 6268938291.

1928398626 is a `hidden beast` number, since 1 + 9 + 2 + 8 + 3 + 9 + 8 + 626 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1928398627) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 453880 + ... + 458108.

It is an arithmetic number, because the mean of its divisors is an integer number (37613160).

Almost surely, 2^1928398626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1928398626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2708147520).

1928398626 is an abundant number, since it is smaller than the sum of its proper divisors (3487896414).

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

1928398626 is a wasteful number, since it uses less digits than its factorization.

1928398626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4309 (or 4299 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 1928398626 is about 43913.5357947866. The cubic root of 1928398626 is about 1244.7026221570.

The spelling of 1928398626 in words is "one billion, nine hundred twenty-eight million, three hundred ninety-eight thousand, six hundred twenty-six".