149857890 has 128 divisors (see below), whose sum is σ = 468840960. Its totient is φ = 29749248.

The previous prime is 149857867. The next prime is 149857891. The reversal of 149857890 is 98758941.

149857890 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (149857891) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 44796 + ... + 48024.

It is an arithmetic number, because the mean of its divisors is an integer number (3662820).

Almost surely, 2^149857890 is an apocalyptic number.

149857890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 149857890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234420480).

149857890 is an abundant number, since it is smaller than the sum of its proper divisors (318983070).

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

149857890 is a wasteful number, since it uses less digits than its factorization.

149857890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3276.

The product of its (nonzero) digits is 725760, while the sum is 51.

The square root of 149857890 is about 12241.6457226959. The cubic root of 149857890 is about 531.1614377860.

The spelling of 149857890 in words is "one hundred forty-nine million, eight hundred fifty-seven thousand, eight hundred ninety".