149581478 has 8 divisors (see below), whose sum is σ = 232109280. Its totient is φ = 72211720.

The previous prime is 149581447. The next prime is 149581511. The reversal of 149581478 is 874185941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1289438 + ... + 1289553.

It is an arithmetic number, because the mean of its divisors is an integer number (29013660).

Almost surely, 2^149581478 is an apocalyptic number.

149581478 is a deficient number, since it is larger than the sum of its proper divisors (82527802).

149581478 is a wasteful number, since it uses less digits than its factorization.

149581478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2579022.

The product of its digits is 322560, while the sum is 47.

The square root of 149581478 is about 12230.3506899843. The cubic root of 149581478 is about 530.8346620718.

The spelling of 149581478 in words is "one hundred forty-nine million, five hundred eighty-one thousand, four hundred seventy-eight".