1398373632 has 252 divisors, whose sum is σ = 4289456640. Its totient is φ = 454616064.

The previous prime is 1398373589. The next prime is 1398373651. The reversal of 1398373632 is 2363738931.

1398373632 is a `hidden beast` number, since 1 + 3 + 9 + 8 + 3 + 7 + 3 + 632 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 11010753 + ... + 11010879.

Almost surely, 2^1398373632 is an apocalyptic number.

1398373632 is a gapful number since it is divisible by the number (12) 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 1398373632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2144728320).

1398373632 is an abundant number, since it is smaller than the sum of its proper divisors (2891083008).

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

1398373632 is an frugal number, since it uses more digits than its factorization.

1398373632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 191 counting only the distinct ones).

The product of its digits is 489888, while the sum is 45.

The square root of 1398373632 is about 37394.8342956617. The cubic root of 1398373632 is about 1118.2555837768.

The spelling of 1398373632 in words is "one billion, three hundred ninety-eight million, three hundred seventy-three thousand, six hundred thirty-two".