149021478 has 32 divisors (see below), whose sum is σ = 337413600. Its totient is φ = 48735648.

The previous prime is 149021423. The next prime is 149021479. The reversal of 149021478 is 874120941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149021479) by changing a digit.

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, 23173 + ... + 28896.

It is an arithmetic number, because the mean of its divisors is an integer number (10544175).

Almost surely, 2^149021478 is an apocalyptic number.

149021478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

149021478 is an abundant number, since it is smaller than the sum of its proper divisors (188392122).

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

149021478 is a wasteful number, since it uses less digits than its factorization.

149021478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52133 (or 52127 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 149021478 is about 12207.4353571911. The cubic root of 149021478 is about 530.1713911105.

The spelling of 149021478 in words is "one hundred forty-nine million, twenty-one thousand, four hundred seventy-eight".