1738493640 has 384 divisors, whose sum is σ = 6566676480. Its totient is φ = 395366400.

The previous prime is 1738493639. The next prime is 1738493657. The reversal of 1738493640 is 463948371.

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 95 ways as a sum of consecutive naturals, for example, 3336580 + ... + 3337100.

It is an arithmetic number, because the mean of its divisors is an integer number (17100720).

Almost surely, 2^1738493640 is an apocalyptic number.

1738493640 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 1738493640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3283338240).

1738493640 is an abundant number, since it is smaller than the sum of its proper divisors (4828182840).

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

1738493640 is a wasteful number, since it uses less digits than its factorization.

1738493640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605 (or 598 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 1738493640 is about 41695.2472111630. The cubic root of 1738493640 is about 1202.4241828170.

The spelling of 1738493640 in words is "one billion, seven hundred thirty-eight million, four hundred ninety-three thousand, six hundred forty".