149773638 has 32 divisors (see below), whose sum is σ = 362479104. Its totient is φ = 40275072.

The previous prime is 149773579. The next prime is 149773643. The reversal of 149773638 is 836377941.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104170 + ... + 105597.

It is an arithmetic number, because the mean of its divisors is an integer number (11327472).

Almost surely, 2^149773638 is an apocalyptic number.

149773638 is an abundant number, since it is smaller than the sum of its proper divisors (212705466).

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

149773638 is a wasteful number, since it uses less digits than its factorization.

149773638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209796.

The product of its digits is 762048, while the sum is 48.

The square root of 149773638 is about 12238.2040349064. The cubic root of 149773638 is about 531.0618772342.

The spelling of 149773638 in words is "one hundred forty-nine million, seven hundred seventy-three thousand, six hundred thirty-eight".