1397828550 has 48 divisors (see below), whose sum is σ = 3560321232. Its totient is φ = 362678400.

The previous prime is 1397828543. The next prime is 1397828567. The reversal of 1397828550 is 558287931.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1397828550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120381 + ... + 131480.

It is an arithmetic number, because the mean of its divisors is an integer number (74173359).

Almost surely, 2^1397828550 is an apocalyptic number.

1397828550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1397828550 is an abundant number, since it is smaller than the sum of its proper divisors (2162492682).

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

1397828550 is a wasteful number, since it uses less digits than its factorization.

1397828550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251913 (or 251908 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 48.

The square root of 1397828550 is about 37387.5453861309. The cubic root of 1397828550 is about 1118.1102672957.

The spelling of 1397828550 in words is "one billion, three hundred ninety-seven million, eight hundred twenty-eight thousand, five hundred fifty".