1690346644 has 24 divisors (see below), whose sum is σ = 3382550528. Its totient is φ = 724036320.

The previous prime is 1690346639. The next prime is 1690346653. The reversal of 1690346644 is 4466430961.

It is a self number, because there is not a number n which added to its sum of digits gives 1690346644.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38509 + ... + 69739.

Almost surely, 2^1690346644 is an apocalyptic number.

1690346644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1690346644 is an abundant number, since it is smaller than the sum of its proper divisors (1692203884).

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

1690346644 is a wasteful number, since it uses less digits than its factorization.

1690346644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33175 (or 33173 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 43.

The square root of 1690346644 is about 41113.8254605431. The cubic root of 1690346644 is about 1191.2198596660.

The spelling of 1690346644 in words is "one billion, six hundred ninety million, three hundred forty-six thousand, six hundred forty-four".