149869478 has 32 divisors (see below), whose sum is σ = 253186560. Its totient is φ = 65950560.

The previous prime is 149869471. The next prime is 149869481. The reversal of 149869478 is 874968941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149869471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91301 + ... + 92927.

It is an arithmetic number, because the mean of its divisors is an integer number (7912080).

Almost surely, 2^149869478 is an apocalyptic number.

149869478 is a deficient number, since it is larger than the sum of its proper divisors (103317082).

149869478 is a wasteful number, since it uses less digits than its factorization.

149869478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1772.

The product of its digits is 3483648, while the sum is 56.

The square root of 149869478 is about 12242.1190159220. The cubic root of 149869478 is about 531.1751284012.

The spelling of 149869478 in words is "one hundred forty-nine million, eight hundred sixty-nine thousand, four hundred seventy-eight".