149911890 has 16 divisors (see below), whose sum is σ = 359788608. Its totient is φ = 39976496.

The previous prime is 149911859. The next prime is 149911891. The reversal of 149911890 is 98119941.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (149911891) 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, 2498502 + ... + 2498561.

It is an arithmetic number, because the mean of its divisors is an integer number (22486788).

Almost surely, 2^149911890 is an apocalyptic number.

149911890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

149911890 is an abundant number, since it is smaller than the sum of its proper divisors (209876718).

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

149911890 is a wasteful number, since it uses less digits than its factorization.

149911890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4997073.

The product of its (nonzero) digits is 23328, while the sum is 42.

The square root of 149911890 is about 12243.8511098429. The cubic root of 149911890 is about 531.2252299408.

The spelling of 149911890 in words is "one hundred forty-nine million, nine hundred eleven thousand, eight hundred ninety".