1299445290 has 192 divisors, whose sum is σ = 4098511872. Its totient is φ = 281318400.

The previous prime is 1299445289. The next prime is 1299445297. The reversal of 1299445290 is 925449921.

1299445290 is a `hidden beast` number, since 1 + 29 + 94 + 452 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1299445297) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 397342 + ... + 400598.

It is an arithmetic number, because the mean of its divisors is an integer number (21346416).

Almost surely, 2^1299445290 is an apocalyptic number.

1299445290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1299445290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2049255936).

1299445290 is an abundant number, since it is smaller than the sum of its proper divisors (2799066582).

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

1299445290 is a wasteful number, since it uses less digits than its factorization.

1299445290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3325 (or 3322 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 1299445290 is about 36047.8194902271. The cubic root of 1299445290 is about 1091.2376285289.

The spelling of 1299445290 in words is "one billion, two hundred ninety-nine million, four hundred forty-five thousand, two hundred ninety".