149969940 has 48 divisors (see below), whose sum is σ = 433466880. Its totient is φ = 38701440.

The previous prime is 149969929. The next prime is 149969947. The reversal of 149969940 is 49969941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149969947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38455 + ... + 42174.

It is an arithmetic number, because the mean of its divisors is an integer number (9030560).

Almost surely, 2^149969940 is an apocalyptic number.

149969940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

149969940 is an abundant number, since it is smaller than the sum of its proper divisors (283496940).

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

149969940 is a wasteful number, since it uses less digits than its factorization.

149969940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80672 (or 80670 counting only the distinct ones).

The product of its (nonzero) digits is 629856, while the sum is 51.

The square root of 149969940 is about 12246.2214580662. The cubic root of 149969940 is about 531.2937894239.

Subtracting from 149969940 its reverse (49969941), we obtain a palindrome (99999999).

The spelling of 149969940 in words is "one hundred forty-nine million, nine hundred sixty-nine thousand, nine hundred forty".