1690750394 has 8 divisors (see below), whose sum is σ = 2536403328. Its totient is φ = 845282620.

The previous prime is 1690750387. The next prime is 1690750417. The reversal of 1690750394 is 4930570961.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1690750394² = 5717273789622310472, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20612 + ... + 61695.

It is an arithmetic number, because the mean of its divisors is an integer number (317050416).

Almost surely, 2^1690750394 is an apocalyptic number.

1690750394 is a deficient number, since it is larger than the sum of its proper divisors (845652934).

1690750394 is a wasteful number, since it uses less digits than its factorization.

1690750394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92580.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 1690750394 is about 41118.7353161548. The cubic root of 1690750394 is about 1191.3146955846.

The spelling of 1690750394 in words is "one billion, six hundred ninety million, seven hundred fifty thousand, three hundred ninety-four".