149085640 has 64 divisors (see below), whose sum is σ = 370656000. Its totient is φ = 53514240.

The previous prime is 149085619. The next prime is 149085649. The reversal of 149085640 is 46580941.

It is a happy number.

149085640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 149085640.

It is not an unprimeable number, because it can be changed into a prime (149085649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32616 + ... + 36904.

It is an arithmetic number, because the mean of its divisors is an integer number (5791500).

Almost surely, 2^149085640 is an apocalyptic number.

149085640 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 149085640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185328000).

149085640 is an abundant number, since it is smaller than the sum of its proper divisors (221570360).

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

149085640 is a wasteful number, since it uses less digits than its factorization.

149085640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4390 (or 4386 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 149085640 is about 12210.0630629002. The cubic root of 149085640 is about 530.2474695756.

The spelling of 149085640 in words is "one hundred forty-nine million, eighty-five thousand, six hundred forty".