1408143981 has 32 divisors (see below), whose sum is σ = 1966648320. Its totient is φ = 895104000.

The previous prime is 1408143977. The next prime is 1408143991. The reversal of 1408143981 is 1893418041.

It is not a de Polignac number, because 1408143981 - 2² = 1408143977 is a prime.

It is a super-2 number, since 2×1408143981² = 3965738942453056722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1408143901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3511381 + ... + 3511781.

It is an arithmetic number, because the mean of its divisors is an integer number (61457760).

Almost surely, 2^1408143981 is an apocalyptic number.

It is an amenable number.

1408143981 is a deficient number, since it is larger than the sum of its proper divisors (558504339).

1408143981 is a wasteful number, since it uses less digits than its factorization.

1408143981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 1408143981 is about 37525.2445828138. The cubic root of 1408143981 is about 1120.8539355457.

The spelling of 1408143981 in words is "one billion, four hundred eight million, one hundred forty-three thousand, nine hundred eighty-one".