1690919424 has 60 divisors (see below), whose sum is σ = 4880121246. Its totient is φ = 563638272.

The previous prime is 1690919411. The next prime is 1690919441. The reversal of 1690919424 is 4249190961.

It can be written as a sum of positive squares in only one way, i.e., 1645113600 + 45805824 = 40560^2 + 6768^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1690919424.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 178869 + ... + 188084.

Almost surely, 2^1690919424 is an apocalyptic number.

It is an amenable number.

1690919424 is an abundant number, since it is smaller than the sum of its proper divisors (3189201822).

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

1690919424 is an equidigital number, since it uses as much as digits as its factorization.

1690919424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366977 (or 366958 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 1690919424 is about 41120.7906538773. The cubic root of 1690919424 is about 1191.3543941732.

The spelling of 1690919424 in words is "one billion, six hundred ninety million, nine hundred nineteen thousand, four hundred twenty-four".