1290489906 has 16 divisors (see below), whose sum is σ = 2585620224. Its totient is φ = 429389904.

The previous prime is 1290489901. The next prime is 1290489919. The reversal of 1290489906 is 6099840921.

It is a super-3 number, since 3×1290489906³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1290489901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189730 + ... + 196413.

It is an arithmetic number, because the mean of its divisors is an integer number (161601264).

Almost surely, 2^1290489906 is an apocalyptic number.

1290489906 is an abundant number, since it is smaller than the sum of its proper divisors (1295130318).

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

1290489906 is a wasteful number, since it uses less digits than its factorization.

1290489906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386705.

The product of its (nonzero) digits is 279936, while the sum is 48.

The square root of 1290489906 is about 35923.3894002222. The cubic root of 1290489906 is about 1088.7250210291.

The spelling of 1290489906 in words is "one billion, two hundred ninety million, four hundred eighty-nine thousand, nine hundred six".