144932840 has 32 divisors (see below), whose sum is σ = 351184680. Its totient is φ = 53513472.

The previous prime is 144932773. The next prime is 144932849. The reversal of 144932840 is 48239441.

It can be written as a sum of positive squares in 4 ways, for example, as 92891044 + 52041796 = 9638^2 + 7214^2 .

It is a super-2 number, since 2×144932840² = 42011056220931200, 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 144932840.

It is not an unprimeable number, because it can be changed into a prime (144932849) 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, 138839 + ... + 139878.

Almost surely, 2^144932840 is an apocalyptic number.

144932840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144932840 is an abundant number, since it is smaller than the sum of its proper divisors (206251840).

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

144932840 is a wasteful number, since it uses less digits than its factorization.

144932840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278741 (or 278737 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 144932840 is about 12038.8055885956. The cubic root of 144932840 is about 525.2776641575.

The spelling of 144932840 in words is "one hundred forty-four million, nine hundred thirty-two thousand, eight hundred forty".