1693484640 has 72 divisors (see below), whose sum is σ = 5779021248. Its totient is φ = 451595520.

The previous prime is 1693484633. The next prime is 1693484657. The reversal of 1693484640 is 464843961.

1693484640 is a `hidden beast` number, since 169 + 3 + 484 + 6 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 586576 + ... + 589455.

It is an arithmetic number, because the mean of its divisors is an integer number (80264184).

Almost surely, 2^1693484640 is an apocalyptic number.

1693484640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1693484640 is an abundant number, since it is smaller than the sum of its proper divisors (4085536608).

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

1693484640 is a wasteful number, since it uses less digits than its factorization.

1693484640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176052 (or 1176041 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The square root of 1693484640 is about 41151.9700621975. The cubic root of 1693484640 is about 1191.9565394121.

The spelling of 1693484640 in words is "one billion, six hundred ninety-three million, four hundred eighty-four thousand, six hundred forty".