1798393040 has 20 divisors (see below), whose sum is σ = 4181264004. Its totient is φ = 719357184.

The previous prime is 1798393039. The next prime is 1798393043. The reversal of 1798393040 is 403938971.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 982947904 + 815445136 = 31352^2 + 28556^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1798392982 and 1798393000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1798393043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11239877 + ... + 11240036.

Almost surely, 2^1798393040 is an apocalyptic number.

1798393040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1798393040 is an abundant number, since it is smaller than the sum of its proper divisors (2382870964).

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

1798393040 is a wasteful number, since it uses less digits than its factorization.

1798393040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22479926 (or 22479920 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 1798393040 is about 42407.4644372898. The cubic root of 1798393040 is about 1216.0782966955.

The spelling of 1798393040 in words is "one billion, seven hundred ninety-eight million, three hundred ninety-three thousand, forty".