145540920 has 64 divisors (see below), whose sum is σ = 499000320. Its totient is φ = 33266304.

The previous prime is 145540909. The next prime is 145540933. The reversal of 145540920 is 29045541.

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

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 85792 + ... + 87471.

It is an arithmetic number, because the mean of its divisors is an integer number (7796880).

Almost surely, 2^145540920 is an apocalyptic number.

145540920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145540920 is an abundant number, since it is smaller than the sum of its proper divisors (353459400).

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

145540920 is a wasteful number, since it uses less digits than its factorization.

145540920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173284 (or 173280 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 145540920 is about 12064.0341511453. The cubic root of 145540920 is about 526.0112572106.

The spelling of 145540920 in words is "one hundred forty-five million, five hundred forty thousand, nine hundred twenty".