143998730 has 16 divisors (see below), whose sum is σ = 261765864. Its totient is φ = 57028800.

The previous prime is 143998711. The next prime is 143998733. The reversal of 143998730 is 37899341.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 133841761 + 10156969 = 11569^2 + 3187^2 .

It is a super-2 number, since 2×143998730² = 41471268483225800, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (143998733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70277 + ... + 72296.

Almost surely, 2^143998730 is an apocalyptic number.

143998730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

143998730 is a deficient number, since it is larger than the sum of its proper divisors (117767134).

143998730 is a wasteful number, since it uses less digits than its factorization.

143998730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142681.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 143998730 is about 11999.9470832167. The cubic root of 143998730 is about 524.1467379384.

The spelling of 143998730 in words is "one hundred forty-three million, nine hundred ninety-eight thousand, seven hundred thirty".