1445408778 has 64 divisors (see below), whose sum is σ = 3295105920. Its totient is φ = 418656000.

The previous prime is 1445408777. The next prime is 1445408791. The reversal of 1445408778 is 8778045441.

It is not an unprimeable number, because it can be changed into a prime (1445408771) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 189576 + ... + 197052.

It is an arithmetic number, because the mean of its divisors is an integer number (51486030).

Almost surely, 2^1445408778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1445408778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1647552960).

1445408778 is an abundant number, since it is smaller than the sum of its proper divisors (1849697142).

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

1445408778 is a wasteful number, since it uses less digits than its factorization.

1445408778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7623.

The product of its (nonzero) digits is 1003520, while the sum is 48.

The square root of 1445408778 is about 38018.5320337332. The cubic root of 1445408778 is about 1130.6553167611.

The spelling of 1445408778 in words is "one billion, four hundred forty-five million, four hundred eight thousand, seven hundred seventy-eight".