149781448 has 16 divisors (see below), whose sum is σ = 285032880. Its totient is φ = 73772688.

The previous prime is 149781431. The next prime is 149781449. The reversal of 149781448 is 844187941.

It is a junction number, because it is equal to n+sod(n) for n = 149781398 and 149781407.

It is not an unprimeable number, because it can be changed into a prime (149781449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139186 + ... + 140257.

It is an arithmetic number, because the mean of its divisors is an integer number (17814555).

Almost surely, 2^149781448 is an apocalyptic number.

It is an amenable number.

149781448 is a deficient number, since it is larger than the sum of its proper divisors (135251432).

149781448 is a wasteful number, since it uses less digits than its factorization.

149781448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279516 (or 279512 counting only the distinct ones).

The product of its digits is 258048, while the sum is 46.

The square root of 149781448 is about 12238.5231135133. The cubic root of 149781448 is about 531.0711078777.

The spelling of 149781448 in words is "one hundred forty-nine million, seven hundred eighty-one thousand, four hundred forty-eight".