1298850840 has 288 divisors, whose sum is σ = 5081778000. Its totient is φ = 286530048.

The previous prime is 1298850829. The next prime is 1298850853. The reversal of 1298850840 is 480588921.

It is a happy number.

1298850840 is a `hidden beast` number, since 1 + 29 + 88 + 508 + 40 = 666.

1298850840 is digitally balanced in base 6, 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 (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 510291 + ... + 512829.

Almost surely, 2^1298850840 is an apocalyptic number.

1298850840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1298850840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2540889000).

1298850840 is an abundant number, since it is smaller than the sum of its proper divisors (3782927160).

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

1298850840 is a wasteful number, since it uses less digits than its factorization.

1298850840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599 (or 2585 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 45.

The square root of 1298850840 is about 36039.5732494157. The cubic root of 1298850840 is about 1091.0712023481.

The spelling of 1298850840 in words is "one billion, two hundred ninety-eight million, eight hundred fifty thousand, eight hundred forty".