144501690 has 32 divisors (see below), whose sum is σ = 349142400. Its totient is φ = 38273984.

The previous prime is 144501677. The next prime is 144501703. The reversal of 144501690 is 96105441.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (144501677) and next prime (144501703).

It is a super-2 number, since 2×144501690² = 41761476825712200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11694 + ... + 20633.

It is an arithmetic number, because the mean of its divisors is an integer number (10910700).

Almost surely, 2^144501690 is an apocalyptic number.

144501690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

144501690 is an abundant number, since it is smaller than the sum of its proper divisors (204640710).

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

144501690 is a wasteful number, since it uses less digits than its factorization.

144501690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32486.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 144501690 is about 12020.8855746987. The cubic root of 144501690 is about 524.7562768955.

The spelling of 144501690 in words is "one hundred forty-four million, five hundred one thousand, six hundred ninety".