144261620 has 12 divisors (see below), whose sum is σ = 302949444. Its totient is φ = 57704640.

The previous prime is 144261619. The next prime is 144261641. The reversal of 144261620 is 26162441.

It can be written as a sum of positive squares in 2 ways, for example, as 58920976 + 85340644 = 7676^2 + 9238^2 .

It is a super-2 number, since 2×144261620² = 41622830010048800, 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 144261620.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3606521 + ... + 3606560.

It is an arithmetic number, because the mean of its divisors is an integer number (25245787).

Almost surely, 2^144261620 is an apocalyptic number.

144261620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144261620 is an abundant number, since it is smaller than the sum of its proper divisors (158687824).

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

144261620 is a wasteful number, since it uses less digits than its factorization.

144261620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7213090 (or 7213088 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 144261620 is about 12010.8958866523. The cubic root of 144261620 is about 524.4655119706.

The spelling of 144261620 in words is "one hundred forty-four million, two hundred sixty-one thousand, six hundred twenty".