1785494340 has 360 divisors, whose sum is σ = 6618471552. Its totient is φ = 401708160.

The previous prime is 1785494329. The next prime is 1785494351. The reversal of 1785494340 is 434945871.

1785494340 is a `hidden beast` number, since 1 + 78 + 549 + 4 + 34 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1785494329) and next prime (1785494351).

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

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 6588405 + ... + 6588675.

Almost surely, 2^1785494340 is an apocalyptic number.

1785494340 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 1785494340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3309235776).

1785494340 is an abundant number, since it is smaller than the sum of its proper divisors (4832977212).

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

1785494340 is a wasteful number, since it uses less digits than its factorization.

1785494340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 1785494340 is about 42255.1102234984. The cubic root of 1785494340 is about 1213.1639392053.

The spelling of 1785494340 in words is "one billion, seven hundred eighty-five million, four hundred ninety-four thousand, three hundred forty".