144671772 has 24 divisors (see below), whose sum is σ = 385791616. Its totient is φ = 41334768.

The previous prime is 144671743. The next prime is 144671789. The reversal of 144671772 is 277176441.

It is a super-2 number, since 2×144671772² = 41859843227239968, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 144671772.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 861058 + ... + 861225.

Almost surely, 2^144671772 is an apocalyptic number.

144671772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

144671772 is an abundant number, since it is smaller than the sum of its proper divisors (241119844).

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

144671772 is a wasteful number, since it uses less digits than its factorization.

144671772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722297 (or 1722295 counting only the distinct ones).

The product of its digits is 65856, while the sum is 39.

The square root of 144671772 is about 12027.9579314196. The cubic root of 144671772 is about 524.9620798008.

The spelling of 144671772 in words is "one hundred forty-four million, six hundred seventy-one thousand, seven hundred seventy-two".