1690078472 has 16 divisors (see below), whose sum is σ = 3278169900. Its totient is φ = 815899840.

The previous prime is 1690078471. The next prime is 1690078483. The reversal of 1690078472 is 2748700961.

It can be written as a sum of positive squares in 2 ways, for example, as 1536169636 + 153908836 = 39194^2 + 12406^2 .

It is not an unprimeable number, because it can be changed into a prime (1690078471) 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 3 ways as a sum of consecutive naturals, for example, 3642179 + ... + 3642642.

Almost surely, 2^1690078472 is an apocalyptic number.

It is an amenable number.

1690078472 is a deficient number, since it is larger than the sum of its proper divisors (1588091428).

1690078472 is a wasteful number, since it uses less digits than its factorization.

1690078472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7284856 (or 7284852 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 1690078472 is about 41110.5639951582. The cubic root of 1690078472 is about 1191.1568610086.

The spelling of 1690078472 in words is "one billion, six hundred ninety million, seventy-eight thousand, four hundred seventy-two".