149667840 has 360 divisors, whose sum is σ = 613398240. Its totient is φ = 33030144.

The previous prime is 149667827. The next prime is 149667851. The reversal of 149667840 is 48766941.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5160946 + ... + 5160974.

It is an arithmetic number, because the mean of its divisors is an integer number (1703884).

Almost surely, 2^149667840 is an apocalyptic number.

149667840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 149667840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306699120).

149667840 is an abundant number, since it is smaller than the sum of its proper divisors (463730400).

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

149667840 is an equidigital number, since it uses as much as digits as its factorization.

149667840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 149667840 is about 12233.8808233528. The cubic root of 149667840 is about 530.9368028888.

The spelling of 149667840 in words is "one hundred forty-nine million, six hundred sixty-seven thousand, eight hundred forty".