145640940 has 24 divisors (see below), whose sum is σ = 407794800. Its totient is φ = 38837568.

The previous prime is 145640939. The next prime is 145641019. The reversal of 145640940 is 49046541.

It is a super-2 number, since 2×145640940² = 42422566808167200, which contains 22 as substring.

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, 1213615 + ... + 1213734.

It is an arithmetic number, because the mean of its divisors is an integer number (16991450).

Almost surely, 2^145640940 is an apocalyptic number.

145640940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145640940 is an abundant number, since it is smaller than the sum of its proper divisors (262153860).

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

145640940 is a wasteful number, since it uses less digits than its factorization.

145640940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2427361 (or 2427359 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 145640940 is about 12068.1788186951. The cubic root of 145640940 is about 526.1317264195.

The spelling of 145640940 in words is "one hundred forty-five million, six hundred forty thousand, nine hundred forty".