1244895390 has 96 divisors (see below), whose sum is σ = 3429522720. Its totient is φ = 312429312.

The previous prime is 1244895373. The next prime is 1244895433. The reversal of 1244895390 is 935984421.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 266152 + ... + 270788.

It is an arithmetic number, because the mean of its divisors is an integer number (35724195).

Almost surely, 2^1244895390 is an apocalyptic number.

1244895390 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 1244895390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1714761360).

1244895390 is an abundant number, since it is smaller than the sum of its proper divisors (2184627330).

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

1244895390 is a wasteful number, since it uses less digits than its factorization.

1244895390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4826 (or 4823 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 1244895390 is about 35283.0751210832. The cubic root of 1244895390 is about 1075.7490046019.

The spelling of 1244895390 in words is "one billion, two hundred forty-four million, eight hundred ninety-five thousand, three hundred ninety".