398011380 has 48 divisors (see below), whose sum is σ = 1200159744. Its totient is φ = 97971840.

The previous prime is 398011379. The next prime is 398011381. The reversal of 398011380 is 83110893.

It is an interprime number because it is at equal distance from previous prime (398011379) and next prime (398011381).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398011381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254356 + ... + 255915.

It is an arithmetic number, because the mean of its divisors is an integer number (25003328).

Almost surely, 2^398011380 is an apocalyptic number.

398011380 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

398011380 is an abundant number, since it is smaller than the sum of its proper divisors (802148364).

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

398011380 is a wasteful number, since it uses less digits than its factorization.

398011380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510296 (or 510294 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 398011380 is about 19950.2225551496. Note that the first 3 decimals coincide. The cubic root of 398011380 is about 735.5832475418.

The spelling of 398011380 in words is "three hundred ninety-eight million, eleven thousand, three hundred eighty".