145438340 has 12 divisors (see below), whose sum is σ = 305420556. Its totient is φ = 58175328.

The previous prime is 145438339. The next prime is 145438343. The reversal of 145438340 is 43834541.

It can be written as a sum of positive squares in 2 ways, for example, as 48888064 + 96550276 = 6992^2 + 9826^2 .

It is a junction number, because it is equal to n+sod(n) for n = 145438297 and 145438306.

It is not an unprimeable number, because it can be changed into a prime (145438343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3635939 + ... + 3635978.

It is an arithmetic number, because the mean of its divisors is an integer number (25451713).

Almost surely, 2^145438340 is an apocalyptic number.

145438340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145438340 is an abundant number, since it is smaller than the sum of its proper divisors (159982216).

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

145438340 is a wasteful number, since it uses less digits than its factorization.

145438340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7271926 (or 7271924 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 145438340 is about 12059.7819217430. The cubic root of 145438340 is about 525.8876472626.

The spelling of 145438340 in words is "one hundred forty-five million, four hundred thirty-eight thousand, three hundred forty".