5401981440 has 120 divisors (see below), whose sum is σ = 18708660828. Its totient is φ = 1440522240.

The previous prime is 5401981439. The next prime is 5401981451. The reversal of 5401981440 is 441891045.

It can be written as a sum of positive squares in 2 ways, for example, as 5316159744 + 85821696 = 72912^2 + 9264^2 .

It is a tau number, because it is divible by the number of its divisors (120).

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

It is a junction number, because it is equal to n+sod(n) for n = 5401981395 and 5401981404.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94191 + ... + 140270.

Almost surely, 2^5401981440 is an apocalyptic number.

It is an amenable number.

5401981440 is an abundant number, since it is smaller than the sum of its proper divisors (13306679388).

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

5401981440 is a wasteful number, since it uses less digits than its factorization.

5401981440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234490 (or 234471 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 5401981440 is about 73498.1730385184. The cubic root of 5401981440 is about 1754.6252006022.

The spelling of 5401981440 in words is "five billion, four hundred one million, nine hundred eighty-one thousand, four hundred forty".