1694948640 has 384 divisors, whose sum is σ = 6729246720. Its totient is φ = 351267840.

The previous prime is 1694948627. The next prime is 1694948641. The reversal of 1694948640 is 468494961.

It is not an unprimeable number, because it can be changed into a prime (1694948641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4471971 + ... + 4472349.

It is an arithmetic number, because the mean of its divisors is an integer number (17524080).

Almost surely, 2^1694948640 is an apocalyptic number.

1694948640 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 1694948640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3364623360).

1694948640 is an abundant number, since it is smaller than the sum of its proper divisors (5034298080).

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

1694948640 is a wasteful number, since it uses less digits than its factorization.

1694948640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 51.

The square root of 1694948640 is about 41169.7539463135. The cubic root of 1694948640 is about 1192.2999185256.

The spelling of 1694948640 in words is "one billion, six hundred ninety-four million, nine hundred forty-eight thousand, six hundred forty".