145344440 has 64 divisors (see below), whose sum is σ = 334812960. Its totient is φ = 56770560.

The previous prime is 145344403. The next prime is 145344457. The reversal of 145344440 is 44443541.

145344440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×145344440² = 42250012477827200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517100 + ... + 517380.

Almost surely, 2^145344440 is an apocalyptic number.

145344440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145344440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167406480).

145344440 is an abundant number, since it is smaller than the sum of its proper divisors (189468520).

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

145344440 is a wasteful number, since it uses less digits than its factorization.

145344440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 145344440 is about 12055.8881879354. Note that the first 3 decimals coincide. The cubic root of 145344440 is about 525.7744458395.

Adding to 145344440 its reverse (44443541), we get a palindrome (189787981).

The spelling of 145344440 in words is "one hundred forty-five million, three hundred forty-four thousand, four hundred forty".