149229820 has 12 divisors (see below), whose sum is σ = 313382664. Its totient is φ = 59691920.

The previous prime is 149229811. The next prime is 149229869. The reversal of 149229820 is 28922941.

It is a self number, because there is not a number n which added to its sum of digits gives 149229820.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3730726 + ... + 3730765.

It is an arithmetic number, because the mean of its divisors is an integer number (26115222).

Almost surely, 2^149229820 is an apocalyptic number.

149229820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

149229820 is an abundant number, since it is smaller than the sum of its proper divisors (164152844).

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

149229820 is a wasteful number, since it uses less digits than its factorization.

149229820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7461500 (or 7461498 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 149229820 is about 12215.9657825323. The cubic root of 149229820 is about 530.4183477551.

It can be divided in two parts, 14922 and 9820, that added together give a palindrome (24742).

The spelling of 149229820 in words is "one hundred forty-nine million, two hundred twenty-nine thousand, eight hundred twenty".