144631640 has 16 divisors (see below), whose sum is σ = 325421280. Its totient is φ = 57852640.

The previous prime is 144631639. The next prime is 144631651. The reversal of 144631640 is 46136441.

It is a super-2 number, since 2×144631640² = 41836622578179200, which contains 22 as substring.

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, 1807856 + ... + 1807935.

It is an arithmetic number, because the mean of its divisors is an integer number (20338830).

Almost surely, 2^144631640 is an apocalyptic number.

144631640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144631640 is an abundant number, since it is smaller than the sum of its proper divisors (180789640).

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

144631640 is a wasteful number, since it uses less digits than its factorization.

144631640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3615802 (or 3615798 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 144631640 is about 12026.2895358460. The cubic root of 144631640 is about 524.9135337570.

The spelling of 144631640 in words is "one hundred forty-four million, six hundred thirty-one thousand, six hundred forty".