1690508430 has 192 divisors, whose sum is σ = 4938006528. Its totient is φ = 398442240.

The previous prime is 1690508411. The next prime is 1690508431. The reversal of 1690508430 is 348050961.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690508431) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4606107 + ... + 4606473.

It is an arithmetic number, because the mean of its divisors is an integer number (25718784).

Almost surely, 2^1690508430 is an apocalyptic number.

1690508430 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 1690508430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2469003264).

1690508430 is an abundant number, since it is smaller than the sum of its proper divisors (3247498098).

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

1690508430 is a wasteful number, since it uses less digits than its factorization.

1690508430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1690508430 is about 41115.7929511277. The cubic root of 1690508430 is about 1191.2578630244.

The spelling of 1690508430 in words is "one billion, six hundred ninety million, five hundred eight thousand, four hundred thirty".