149138406 has 24 divisors (see below), whose sum is σ = 323532144. Its totient is φ = 49651440.

The previous prime is 149138401. The next prime is 149138413. The reversal of 149138406 is 604831941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149138401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11296 + ... + 20636.

It is an arithmetic number, because the mean of its divisors is an integer number (13480506).

Almost surely, 2^149138406 is an apocalyptic number.

149138406 is an abundant number, since it is smaller than the sum of its proper divisors (174393738).

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

149138406 is a wasteful number, since it uses less digits than its factorization.

149138406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10236 (or 10233 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 149138406 is about 12212.2236304450. The cubic root of 149138406 is about 530.3100191673.

The spelling of 149138406 in words is "one hundred forty-nine million, one hundred thirty-eight thousand, four hundred six".