1445407500 has 90 divisors (see below), whose sum is σ = 4224044748. Its totient is φ = 384564000.

The previous prime is 1445407499. The next prime is 1445407529. The reversal of 1445407500 is 57045441.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 3292281 + ... + 3292719.

Almost surely, 2^1445407500 is an apocalyptic number.

1445407500 is a gapful number since it is divisible by the number (10) 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 1445407500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2112022374).

1445407500 is an abundant number, since it is smaller than the sum of its proper divisors (2778637248).

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

1445407500 is an frugal number, since it uses more digits than its factorization.

1445407500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 30.

The square root of 1445407500 is about 38018.5152261369. The cubic root of 1445407500 is about 1130.6549835271.

The spelling of 1445407500 in words is "one billion, four hundred forty-five million, four hundred seven thousand, five hundred".