1399202280 has 192 divisors, whose sum is σ = 5221532160. Its totient is φ = 318311424.

The previous prime is 1399202251. The next prime is 1399202293. The reversal of 1399202280 is 822029931.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 585969 + ... + 588351.

It is an arithmetic number, because the mean of its divisors is an integer number (27195480).

Almost surely, 2^1399202280 is an apocalyptic number.

1399202280 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 1399202280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2610766080).

1399202280 is an abundant number, since it is smaller than the sum of its proper divisors (3822329880).

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

1399202280 is a wasteful number, since it uses less digits than its factorization.

1399202280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640 (or 2633 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1399202280 is about 37405.9123668973. The cubic root of 1399202280 is about 1118.4764253925.

The spelling of 1399202280 in words is "one billion, three hundred ninety-nine million, two hundred two thousand, two hundred eighty".