149021490 has 64 divisors (see below), whose sum is σ = 386809344. Its totient is φ = 36599808.

The previous prime is 149021479. The next prime is 149021573. The reversal of 149021490 is 94120941.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20862 + ... + 27078.

It is an arithmetic number, because the mean of its divisors is an integer number (6043896).

Almost surely, 2^149021490 is an apocalyptic number.

149021490 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 149021490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193404672).

149021490 is an abundant number, since it is smaller than the sum of its proper divisors (237787854).

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

149021490 is a wasteful number, since it uses less digits than its factorization.

149021490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6291.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 149021490 is about 12207.4358486948. The cubic root of 149021490 is about 530.1714053413.

The spelling of 149021490 in words is "one hundred forty-nine million, twenty-one thousand, four hundred ninety".