1690884456 has 16 divisors (see below), whose sum is σ = 4227211200. Its totient is φ = 563628144.

The previous prime is 1690884451. The next prime is 1690884457. The reversal of 1690884456 is 6544880961.

It is a junction number, because it is equal to n+sod(n) for n = 1690884399 and 1690884408.

It is not an unprimeable number, because it can be changed into a prime (1690884451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35226736 + ... + 35226783.

It is an arithmetic number, because the mean of its divisors is an integer number (264200700).

Almost surely, 2^1690884456 is an apocalyptic number.

It is an amenable number.

1690884456 is an abundant number, since it is smaller than the sum of its proper divisors (2536326744).

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

1690884456 is a wasteful number, since it uses less digits than its factorization.

1690884456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70453528 (or 70453524 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 51.

The square root of 1690884456 is about 41120.3654653020. The cubic root of 1690884456 is about 1191.3461817639.

The spelling of 1690884456 in words is "one billion, six hundred ninety million, eight hundred eighty-four thousand, four hundred fifty-six".