1697828421240 has 256 divisors, whose sum is σ = 6530716108800. Its totient is φ = 384307172352.

The previous prime is 1697828421203. The next prime is 1697828421271. The reversal of 1697828421240 is 421248287961.

1697828421240 is a `hidden beast` number, since 16 + 97 + 8 + 284 + 21 + 240 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 311517 + ... + 1868876.

It is an arithmetic number, because the mean of its divisors is an integer number (25510609800).

Almost surely, 2^{1697828421240} is an apocalyptic number.

1697828421240 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 1697828421240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3265358054400).

1697828421240 is an abundant number, since it is smaller than the sum of its proper divisors (4832887687560).

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

1697828421240 is a wasteful number, since it uses less digits than its factorization.

1697828421240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180523 (or 2180513 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The spelling of 1697828421240 in words is "one trillion, six hundred ninety-seven billion, eight hundred twenty-eight million, four hundred twenty-one thousand, two hundred forty".