981447400 has 48 divisors (see below), whose sum is σ = 2416100940. Its totient is φ = 369484800.

The previous prime is 981447391. The next prime is 981447419. The reversal of 981447400 is 4744189.

It can be written as a sum of positive squares in 6 ways, for example, as 567487684 + 413959716 = 23822^2 + 20346^2 .

It is a super-3 number, since 3×981447400³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 981447400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140931 + ... + 147730.

Almost surely, 2^981447400 is an apocalyptic number.

It is an amenable number.

981447400 is an abundant number, since it is smaller than the sum of its proper divisors (1434653540).

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

981447400 is a wasteful number, since it uses less digits than its factorization.

981447400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288694 (or 288685 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 981447400 is about 31328.0609039245. The cubic root of 981447400 is about 993.7771565433. Note that the first 3 decimals are identical.

The spelling of 981447400 in words is "nine hundred eighty-one million, four hundred forty-seven thousand, four hundred".