145203640 has 32 divisors (see below), whose sum is σ = 327492000. Its totient is φ = 57942144.

The previous prime is 145203599. The next prime is 145203649. The reversal of 145203640 is 46302541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145203649) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 13426 + ... + 21694.

It is an arithmetic number, because the mean of its divisors is an integer number (10234125).

Almost surely, 2^145203640 is an apocalyptic number.

145203640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145203640 is an abundant number, since it is smaller than the sum of its proper divisors (182288360).

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

145203640 is a wasteful number, since it uses less digits than its factorization.

145203640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8719 (or 8715 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 145203640 is about 12050.0473028117. The cubic root of 145203640 is about 525.6046125807.

The spelling of 145203640 in words is "one hundred forty-five million, two hundred three thousand, six hundred forty".