1445223730 has 16 divisors (see below), whose sum is σ = 2602277784. Its totient is φ = 577895040.

The previous prime is 1445223713. The next prime is 1445223743. The reversal of 1445223730 is 373225441.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1263162681 + 182061049 = 35541^2 + 13493^2 .

It is a super-2 number, since 2×1445223730² = 4177343259510225800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1445223692 and 1445223701.

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, 9094 + ... + 54526.

Almost surely, 2^1445223730 is an apocalyptic number.

1445223730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1445223730 is a deficient number, since it is larger than the sum of its proper divisors (1157054054).

1445223730 is a wasteful number, since it uses less digits than its factorization.

1445223730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48621.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 1445223730 is about 38016.0983005884. The cubic root of 1445223730 is about 1130.6070641059.

The spelling of 1445223730 in words is "one billion, four hundred forty-five million, two hundred twenty-three thousand, seven hundred thirty".