1690263456 has 48 divisors (see below), whose sum is σ = 5070792384. Its totient is φ = 482932224.

The previous prime is 1690263433. The next prime is 1690263467. The reversal of 1690263456 is 6543620961.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1256965 + ... + 1258308.

It is an arithmetic number, because the mean of its divisors is an integer number (105641508).

Almost surely, 2^1690263456 is an apocalyptic number.

1690263456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1690263456 is an abundant number, since it is smaller than the sum of its proper divisors (3380528928).

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

1690263456 is a wasteful number, since it uses less digits than its factorization.

1690263456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2515293 (or 2515285 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 1690263456 is about 41112.8137689456. The cubic root of 1690263456 is about 1191.2003179498.

The spelling of 1690263456 in words is "one billion, six hundred ninety million, two hundred sixty-three thousand, four hundred fifty-six".