145915644 has 48 divisors (see below), whose sum is σ = 391532288. Its totient is φ = 41430528.

The previous prime is 145915633. The next prime is 145915661. The reversal of 145915644 is 446519541.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8364 + ... + 19020.

Almost surely, 2^145915644 is an apocalyptic number.

145915644 is a gapful number since it is divisible by the number (14) 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 145915644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195766144).

145915644 is an abundant number, since it is smaller than the sum of its proper divisors (245616644).

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

145915644 is a wasteful number, since it uses less digits than its factorization.

145915644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10834 (or 10832 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The square root of 145915644 is about 12079.5547931205. The cubic root of 145915644 is about 526.4623104687.

The spelling of 145915644 in words is "one hundred forty-five million, nine hundred fifteen thousand, six hundred forty-four".