149639646 has 32 divisors (see below), whose sum is σ = 323487360. Its totient is φ = 45873504.

The previous prime is 149639639. The next prime is 149639647. The reversal of 149639646 is 646936941.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 149639595 and 149639604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149639647) 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, 18685 + ... + 25463.

It is an arithmetic number, because the mean of its divisors is an integer number (10108980).

Almost surely, 2^149639646 is an apocalyptic number.

149639646 is an abundant number, since it is smaller than the sum of its proper divisors (173847714).

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

149639646 is a wasteful number, since it uses less digits than its factorization.

149639646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7080.

The product of its digits is 839808, while the sum is 48.

The square root of 149639646 is about 12232.7284773267. The cubic root of 149639646 is about 530.9034620093.

The spelling of 149639646 in words is "one hundred forty-nine million, six hundred thirty-nine thousand, six hundred forty-six".