1688774670 has 96 divisors (see below), whose sum is σ = 4967464320. Its totient is φ = 409393440.

The previous prime is 1688774657. The next prime is 1688774671. The reversal of 1688774670 is 764778861.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1688774671) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4860 + ... + 58319.

It is an arithmetic number, because the mean of its divisors is an integer number (51744420).

Almost surely, 2^1688774670 is an apocalyptic number.

1688774670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1688774670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2483732160).

1688774670 is an abundant number, since it is smaller than the sum of its proper divisors (3278689650).

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

1688774670 is a wasteful number, since it uses less digits than its factorization.

1688774670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63212 (or 63200 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 54.

The square root of 1688774670 is about 41094.7036733446. The cubic root of 1688774670 is about 1190.8504783457.

The spelling of 1688774670 in words is "one billion, six hundred eighty-eight million, seven hundred seventy-four thousand, six hundred seventy".