149271738 has 96 divisors (see below), whose sum is σ = 383444928. Its totient is φ = 38304000.

The previous prime is 149271721. The next prime is 149271743. The reversal of 149271738 is 837172941.

It is a Harshad number since it is a multiple of its sum of digits (42).

Its product of digits (84672) is a multiple of the sum of its prime factors (588).

It is a self number, because there is not a number n which added to its sum of digits gives 149271738.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 326406 + ... + 326862.

It is an arithmetic number, because the mean of its divisors is an integer number (3994218).

Almost surely, 2^149271738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 149271738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191722464).

149271738 is an abundant number, since it is smaller than the sum of its proper divisors (234173190).

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

149271738 is a wasteful number, since it uses less digits than its factorization.

149271738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588 (or 581 counting only the distinct ones).

The product of its digits is 84672, while the sum is 42.

The square root of 149271738 is about 12217.6813675918. The cubic root of 149271738 is about 530.4680071659.

The spelling of 149271738 in words is "one hundred forty-nine million, two hundred seventy-one thousand, seven hundred thirty-eight".