149646640 has 160 divisors (see below), whose sum is σ = 415973376. Its totient is φ = 49351680.

The previous prime is 149646617. The next prime is 149646643. The reversal of 149646640 is 46646941.

149646640 is digitally balanced in base 2, because in such base 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 (40).

It is a junction number, because it is equal to n+sod(n) for n = 149646593 and 149646602.

It is not an unprimeable number, because it can be changed into a prime (149646643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1178257 + ... + 1178383.

Almost surely, 2^149646640 is an apocalyptic number.

149646640 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 149646640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207986688).

149646640 is an abundant number, since it is smaller than the sum of its proper divisors (266326736).

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

149646640 is a wasteful number, since it uses less digits than its factorization.

149646640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 261 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 149646640 is about 12233.0143464315. The cubic root of 149646640 is about 530.9117331706.

The spelling of 149646640 in words is "one hundred forty-nine million, six hundred forty-six thousand, six hundred forty".