145623744 has 140 divisors (see below), whose sum is σ = 493465104. Its totient is φ = 41596416.

The previous prime is 145623743. The next prime is 145623773. The reversal of 145623744 is 447326541.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 145623699 and 145623708.

It is not an unprimeable number, because it can be changed into a prime (145623743) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 34282 + ... + 38294.

Almost surely, 2^145623744 is an apocalyptic number.

145623744 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 145623744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246732552).

145623744 is an abundant number, since it is smaller than the sum of its proper divisors (347841360).

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

145623744 is an equidigital number, since it uses as much as digits as its factorization.

145623744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4044 (or 4025 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 145623744 is about 12067.4663455093. The cubic root of 145623744 is about 526.1110186037. Note that the first 3 decimals are identical.

It can be divided in two parts, 1456 and 23744, that added together give a triangular number (25200 = T₂₂₄).

The spelling of 145623744 in words is "one hundred forty-five million, six hundred twenty-three thousand, seven hundred forty-four".