145540040 has 32 divisors (see below), whose sum is σ = 338031360. Its totient is φ = 56337600.

The previous prime is 145540039. The next prime is 145540049. The reversal of 145540040 is 40045541.

It is a junction number, because it is equal to n+sod(n) for n = 145539988 and 145540015.

It is not an unprimeable number, because it can be changed into a prime (145540049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57446 + ... + 59925.

It is an arithmetic number, because the mean of its divisors is an integer number (10563480).

Almost surely, 2^145540040 is an apocalyptic number.

145540040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145540040 is an abundant number, since it is smaller than the sum of its proper divisors (192491320).

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

145540040 is a wasteful number, since it uses less digits than its factorization.

145540040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117413 (or 117409 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 145540040 is about 12063.9976790449. The cubic root of 145540040 is about 526.0101970487.

Adding to 145540040 its reverse (40045541), we get a palindrome (185585581).

The spelling of 145540040 in words is "one hundred forty-five million, five hundred forty thousand, forty".