1690961472 has 168 divisors, whose sum is σ = 5108326080. Its totient is φ = 533744640.

The previous prime is 1690961471. The next prime is 1690961473. The reversal of 1690961472 is 2741690961.

1690961472 is a `hidden beast` number, since 1 + 6 + 90 + 96 + 1 + 472 = 666.

It is an interprime number because it is at equal distance from previous prime (1690961471) and next prime (1690961473).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (1690961471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1443447 + ... + 1444617.

Almost surely, 2^1690961472 is an apocalyptic number.

1690961472 is a gapful number since it is divisible by the number (12) 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 1690961472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2554163040).

1690961472 is an abundant number, since it is smaller than the sum of its proper divisors (3417364608).

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

1690961472 is a wasteful number, since it uses less digits than its factorization.

1690961472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321 (or 1308 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 1690961472 is about 41121.3019249148. The cubic root of 1690961472 is about 1191.3642692060.

The spelling of 1690961472 in words is "one billion, six hundred ninety million, nine hundred sixty-one thousand, four hundred seventy-two".