1698420840 has 64 divisors (see below), whose sum is σ = 5100226560. Its totient is φ = 452471040.

The previous prime is 1698420833. The next prime is 1698420863. The reversal of 1698420840 is 480248961.

It is a junction number, because it is equal to n+sod(n) for n = 1698420792 and 1698420801.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127705 + ... + 140375.

It is an arithmetic number, because the mean of its divisors is an integer number (79691040).

Almost surely, 2^1698420840 is an apocalyptic number.

1698420840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1698420840 is an abundant number, since it is smaller than the sum of its proper divisors (3401805720).

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

1698420840 is a wasteful number, since it uses less digits than its factorization.

1698420840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13802 (or 13798 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 1698420840 is about 41211.9016790053. The cubic root of 1698420840 is about 1193.1135282418.

The spelling of 1698420840 in words is "one billion, six hundred ninety-eight million, four hundred twenty thousand, eight hundred forty".