1398463280 has 20 divisors (see below), whose sum is σ = 3251427312. Its totient is φ = 559385280.

The previous prime is 1398463277. The next prime is 1398463291. The reversal of 1398463280 is 823648931.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8740316 + ... + 8740475.

Almost surely, 2^1398463280 is an apocalyptic number.

1398463280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1398463280 is an abundant number, since it is smaller than the sum of its proper divisors (1852964032).

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

1398463280 is a wasteful number, since it uses less digits than its factorization.

1398463280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17480804 (or 17480798 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 1398463280 is about 37396.0329446855. The cubic root of 1398463280 is about 1118.2794799258.

The spelling of 1398463280 in words is "one billion, three hundred ninety-eight million, four hundred sixty-three thousand, two hundred eighty".