148991904 has 144 divisors (see below), whose sum is σ = 443675232. Its totient is φ = 47384064.

The previous prime is 148991891. The next prime is 148991917. The reversal of 148991904 is 409199841.

It is an interprime number because it is at equal distance from previous prime (148991891) and next prime (148991917).

It is a tau number, because it is divible by the number of its divisors (144).

It is a self number, because there is not a number n which added to its sum of digits gives 148991904.

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 23 ways as a sum of consecutive naturals, for example, 656239 + ... + 656465.

It is an arithmetic number, because the mean of its divisors is an integer number (3081078).

Almost surely, 2^148991904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 148991904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221837616).

148991904 is an abundant number, since it is smaller than the sum of its proper divisors (294683328).

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

148991904 is a wasteful number, since it uses less digits than its factorization.

148991904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 148991904 is about 12206.2239861474. The cubic root of 148991904 is about 530.1363171372.

The spelling of 148991904 in words is "one hundred forty-eight million, nine hundred ninety-one thousand, nine hundred four".