1445375820 has 48 divisors (see below), whose sum is σ = 4625203968. Its totient is φ = 330371520.

The previous prime is 1445375803. The next prime is 1445375831. The reversal of 1445375820 is 285735441.

It is a super-2 number, since 2×1445375820² = 4178222522081344800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1720266 + ... + 1721105.

It is an arithmetic number, because the mean of its divisors is an integer number (96358416).

Almost surely, 2^1445375820 is an apocalyptic number.

1445375820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1445375820 is an abundant number, since it is smaller than the sum of its proper divisors (3179828148).

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

1445375820 is a wasteful number, since it uses less digits than its factorization.

1445375820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3441390 (or 3441388 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 1445375820 is about 38018.0985847530. The cubic root of 1445375820 is about 1130.6467230166.

The spelling of 1445375820 in words is "one billion, four hundred forty-five million, three hundred seventy-five thousand, eight hundred twenty".