149978406 has 16 divisors (see below), whose sum is σ = 300906864. Its totient is φ = 49834464.

The previous prime is 149978399. The next prime is 149978407. The reversal of 149978406 is 604879941.

149978406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149978407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37525 + ... + 41328.

It is an arithmetic number, because the mean of its divisors is an integer number (18806679).

Almost surely, 2^149978406 is an apocalyptic number.

149978406 is an abundant number, since it is smaller than the sum of its proper divisors (150928458).

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

149978406 is a wasteful number, since it uses less digits than its factorization.

149978406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79175.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 149978406 is about 12246.5671108274. The cubic root of 149978406 is about 531.3037866464.

The spelling of 149978406 in words is "one hundred forty-nine million, nine hundred seventy-eight thousand, four hundred six".