1290061892 has 24 divisors (see below), whose sum is σ = 2588545344. Its totient is φ = 551079072.

The previous prime is 1290061889. The next prime is 1290061909. The reversal of 1290061892 is 2981600921.

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, 66443 + ... + 83634.

It is an arithmetic number, because the mean of its divisors is an integer number (107856056).

Almost surely, 2^1290061892 is an apocalyptic number.

It is an amenable number.

1290061892 is an abundant number, since it is smaller than the sum of its proper divisors (1298483452).

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

1290061892 is a wasteful number, since it uses less digits than its factorization.

1290061892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150395 (or 150393 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 1290061892 is about 35917.4315896891. The cubic root of 1290061892 is about 1088.6046426942.

The spelling of 1290061892 in words is "one billion, two hundred ninety million, sixty-one thousand, eight hundred ninety-two".