1698896040 has 128 divisors (see below), whose sum is σ = 5160758400. Its totient is φ = 447390720.

The previous prime is 1698896021. The next prime is 1698896047. The reversal of 1698896040 is 406988961.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1698896047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5798134 + ... + 5798426.

It is an arithmetic number, because the mean of its divisors is an integer number (40318425).

Almost surely, 2^1698896040 is an apocalyptic number.

1698896040 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 1698896040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2580379200).

1698896040 is an abundant number, since it is smaller than the sum of its proper divisors (3461862360).

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

1698896040 is a wasteful number, since it uses less digits than its factorization.

1698896040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747 (or 743 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 1698896040 is about 41217.6666006216. Note that the first 4 decimals coincide. The cubic root of 1698896040 is about 1193.2247913372.

The spelling of 1698896040 in words is "one billion, six hundred ninety-eight million, eight hundred ninety-six thousand, forty".