145436240 has 40 divisors (see below), whose sum is σ = 344529288. Its totient is φ = 57075200.

The previous prime is 145436237. The next prime is 145436257. The reversal of 145436240 is 42634541.

It can be written as a sum of positive squares in 4 ways, for example, as 5345344 + 140090896 = 2312^2 + 11836^2 .

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, 12911 + ... + 21390.

Almost surely, 2^145436240 is an apocalyptic number.

145436240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145436240 is an abundant number, since it is smaller than the sum of its proper divisors (199093048).

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

145436240 is a wasteful number, since it uses less digits than its factorization.

145436240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34367 (or 34361 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 145436240 is about 12059.6948551777. The cubic root of 145436240 is about 525.8851161341.

The spelling of 145436240 in words is "one hundred forty-five million, four hundred thirty-six thousand, two hundred forty".