145138880 has 28 divisors (see below), whose sum is σ = 345612720. Its totient is φ = 58055424.

The previous prime is 145138871. The next prime is 145138883. The reversal of 145138880 is 88831541.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (145138883) 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, 226460 + ... + 227099.

Almost surely, 2^145138880 is an apocalyptic number.

145138880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145138880 is an abundant number, since it is smaller than the sum of its proper divisors (200473840).

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

145138880 is an equidigital number, since it uses as much as digits as its factorization.

145138880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453576 (or 453566 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 145138880 is about 12047.3598767531. The cubic root of 145138880 is about 525.5264620692.

The spelling of 145138880 in words is "one hundred forty-five million, one hundred thirty-eight thousand, eight hundred eighty".