1799450640 has 400 divisors, whose sum is σ = 6907901616. Its totient is φ = 431308800.

The previous prime is 1799450623. The next prime is 1799450687. The reversal of 1799450640 is 460549971.

1799450640 is a `hidden beast` number, since 17 + 9 + 94 + 506 + 40 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 673713936 + 1125736704 = 25956^2 + 33552^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 79 ways as a sum of consecutive naturals, for example, 3453580 + ... + 3454100.

Almost surely, 2^1799450640 is an apocalyptic number.

1799450640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1799450640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3453950808).

1799450640 is an abundant number, since it is smaller than the sum of its proper divisors (5108450976).

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

1799450640 is a wasteful number, since it uses less digits than its factorization.

1799450640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600 (or 585 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 1799450640 is about 42419.9321074421. The cubic root of 1799450640 is about 1216.3166339862.

The spelling of 1799450640 in words is "one billion, seven hundred ninety-nine million, four hundred fifty thousand, six hundred forty".