144511820 has 24 divisors (see below), whose sum is σ = 310534224. Its totient is φ = 56460096.

The previous prime is 144511819. The next prime is 144511823. The reversal of 144511820 is 28115441.

It is a super-2 number, since 2×144511820² = 41767332239424800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 144511820.

It is not an unprimeable number, because it can be changed into a prime (144511823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83159 + ... + 84878.

It is an arithmetic number, because the mean of its divisors is an integer number (12938926).

Almost surely, 2^144511820 is an apocalyptic number.

144511820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144511820 is an abundant number, since it is smaller than the sum of its proper divisors (166022404).

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

144511820 is a wasteful number, since it uses less digits than its factorization.

144511820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168089 (or 168087 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 144511820 is about 12021.3069173031. The cubic root of 144511820 is about 524.7685389364.

The spelling of 144511820 in words is "one hundred forty-four million, five hundred eleven thousand, eight hundred twenty".