145303640 has 32 divisors (see below), whose sum is σ = 344142000. Its totient is φ = 55062144.

The previous prime is 145303619. The next prime is 145303661. The reversal of 145303640 is 46303541.

It is an interprime number because it is at equal distance from previous prime (145303619) and next prime (145303661).

It is a super-2 number, since 2×145303640² = 42226295594499200, 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 7 ways as a sum of consecutive naturals, for example, 94835 + ... + 96354.

Almost surely, 2^145303640 is an apocalyptic number.

145303640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145303640 is an abundant number, since it is smaller than the sum of its proper divisors (198838360).

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

145303640 is a wasteful number, since it uses less digits than its factorization.

145303640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191219 (or 191215 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 145303640 is about 12054.1959499587. The cubic root of 145303640 is about 525.7252440836.

Subtracting from 145303640 its reverse (46303541), we obtain a palindrome (99000099).

The spelling of 145303640 in words is "one hundred forty-five million, three hundred three thousand, six hundred forty".