1490661438 has 24 divisors (see below), whose sum is σ = 3468070152. Its totient is φ = 425903184.

The previous prime is 1490661409. The next prime is 1490661449. The reversal of 1490661438 is 8341660941.

1490661438 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1490661438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2534845 + ... + 2535432.

It is an arithmetic number, because the mean of its divisors is an integer number (144502923).

Almost surely, 2^1490661438 is an apocalyptic number.

1490661438 is an abundant number, since it is smaller than the sum of its proper divisors (1977408714).

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

1490661438 is a wasteful number, since it uses less digits than its factorization.

1490661438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5070296 (or 5070289 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 1490661438 is about 38609.0849153408. The cubic root of 1490661438 is about 1142.3337433940. Note that the first 3 decimals are identical.

The spelling of 1490661438 in words is "one billion, four hundred ninety million, six hundred sixty-one thousand, four hundred thirty-eight".