1398018132 has 36 divisors (see below), whose sum is σ = 4038719776. Its totient is φ = 399433680.

The previous prime is 1398018121. The next prime is 1398018133. The reversal of 1398018132 is 2318108931.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398018133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2773594 + ... + 2774097.

Almost surely, 2^1398018132 is an apocalyptic number.

1398018132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1398018132 is an abundant number, since it is smaller than the sum of its proper divisors (2640701644).

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

1398018132 is a wasteful number, since it uses less digits than its factorization.

1398018132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5547708 (or 5547703 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1398018132 is about 37390.0806631919. The cubic root of 1398018132 is about 1118.1608133130.

The spelling of 1398018132 in words is "one billion, three hundred ninety-eight million, eighteen thousand, one hundred thirty-two".