145331748 has 18 divisors (see below), whose sum is σ = 367366454. Its totient is φ = 48443904.

The previous prime is 145331729. The next prime is 145331773. The reversal of 145331748 is 847133541.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 137311524 + 8020224 = 11718^2 + 2832^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×145331748² = 42242633953471008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 4036993 = 145331748 / (1 + 4 + 5 + 3 + 3 + 1 + 7 + 4 + 8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2018461 + ... + 2018532.

Almost surely, 2^145331748 is an apocalyptic number.

145331748 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

145331748 is an abundant number, since it is smaller than the sum of its proper divisors (222034706).

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

145331748 is a wasteful number, since it uses less digits than its factorization.

145331748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4037003 (or 4036998 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 145331748 is about 12055.3617946539. The cubic root of 145331748 is about 525.7591412212.

The spelling of 145331748 in words is "one hundred forty-five million, three hundred thirty-one thousand, seven hundred forty-eight".