144742440 has 32 divisors (see below), whose sum is σ = 434227680. Its totient is φ = 38597952.

The previous prime is 144742439. The next prime is 144742453. The reversal of 144742440 is 44247441.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 144742398 and 144742407.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 602974 + ... + 603213.

It is an arithmetic number, because the mean of its divisors is an integer number (13569615).

Almost surely, 2^144742440 is an apocalyptic number.

144742440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144742440 is an abundant number, since it is smaller than the sum of its proper divisors (289485240).

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

144742440 is a wasteful number, since it uses less digits than its factorization.

144742440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206201 (or 1206197 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 30.

The square root of 144742440 is about 12030.8952285356. The cubic root of 144742440 is about 525.0475421799.

Adding to 144742440 its reverse (44247441), we get a palindrome (188989881).

The spelling of 144742440 in words is "one hundred forty-four million, seven hundred forty-two thousand, four hundred forty".