146642640 has 40 divisors (see below), whose sum is σ = 454592928. Its totient is φ = 39104640.

The previous prime is 146642623. The next prime is 146642653. The reversal of 146642640 is 46246641.

146642640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305266 + ... + 305745.

Almost surely, 2^146642640 is an apocalyptic number.

146642640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

146642640 is an abundant number, since it is smaller than the sum of its proper divisors (307950288).

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

146642640 is a wasteful number, since it uses less digits than its factorization.

146642640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611027 (or 611021 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 146642640 is about 12109.6094074086. The cubic root of 146642640 is about 527.3351940549.

The spelling of 146642640 in words is "one hundred forty-six million, six hundred forty-two thousand, six hundred forty".