144639490 has 16 divisors (see below), whose sum is σ = 268750080. Its totient is φ = 55989360.

The previous prime is 144639463. The next prime is 144639493. The reversal of 144639490 is 94936441.

It is not an unprimeable number, because it can be changed into a prime (144639493) 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, 232980 + ... + 233599.

It is an arithmetic number, because the mean of its divisors is an integer number (16796880).

Almost surely, 2^144639490 is an apocalyptic number.

144639490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

144639490 is a deficient number, since it is larger than the sum of its proper divisors (124110590).

144639490 is a wasteful number, since it uses less digits than its factorization.

144639490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466617.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 144639490 is about 12026.6158997450. The cubic root of 144639490 is about 524.9230302883.

The spelling of 144639490 in words is "one hundred forty-four million, six hundred thirty-nine thousand, four hundred ninety".