145541988 has 24 divisors (see below), whose sum is σ = 377331360. Its totient is φ = 48513960.

The previous prime is 145541969. The next prime is 145542013. The reversal of 145541988 is 889145541.

It is a happy number.

145541988 is a `hidden beast` number, since 1 + 4 + 554 + 1 + 98 + 8 = 666.

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 7 ways as a sum of consecutive naturals, for example, 673698 + ... + 673913.

It is an arithmetic number, because the mean of its divisors is an integer number (15722140).

Almost surely, 2^145541988 is an apocalyptic number.

145541988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

145541988 is an abundant number, since it is smaller than the sum of its proper divisors (231789372).

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

145541988 is a wasteful number, since it uses less digits than its factorization.

145541988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347624 (or 1347616 counting only the distinct ones).

The product of its digits is 230400, while the sum is 45.

The square root of 145541988 is about 12064.0784148645. The cubic root of 145541988 is about 526.0125438560.

The spelling of 145541988 in words is "one hundred forty-five million, five hundred forty-one thousand, nine hundred eighty-eight".