1687434080 has 48 divisors (see below), whose sum is σ = 4196389680. Its totient is φ = 639447552.

The previous prime is 1687434053. The next prime is 1687434083. The reversal of 1687434080 is 804347861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1687434083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274499 + ... + 280578.

It is an arithmetic number, because the mean of its divisors is an integer number (87424785).

Almost surely, 2^1687434080 is an apocalyptic number.

1687434080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1687434080 is an abundant number, since it is smaller than the sum of its proper divisors (2508955600).

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

1687434080 is a wasteful number, since it uses less digits than its factorization.

1687434080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555111 (or 555103 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 1687434080 is about 41078.3894523629. The cubic root of 1687434080 is about 1190.5352863332.

The spelling of 1687434080 in words is "one billion, six hundred eighty-seven million, four hundred thirty-four thousand, eighty".