149123780 has 48 divisors (see below), whose sum is σ = 355010880. Its totient is φ = 52161408.

The previous prime is 149123753. The next prime is 149123803. The reversal of 149123780 is 87321941.

It is a super-2 number, since 2×149123780² = 44475803522976800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 149123780.

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 15 ways as a sum of consecutive naturals, for example, 10154 + ... + 20033.

It is an arithmetic number, because the mean of its divisors is an integer number (7396060).

Almost surely, 2^149123780 is an apocalyptic number.

149123780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

149123780 is an abundant number, since it is smaller than the sum of its proper divisors (205887100).

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

149123780 is a wasteful number, since it uses less digits than its factorization.

149123780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30228 (or 30226 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 149123780 is about 12211.6247895192. The cubic root of 149123780 is about 530.2926827702.

The spelling of 149123780 in words is "one hundred forty-nine million, one hundred twenty-three thousand, seven hundred eighty".