1449947820 has 24 divisors (see below), whose sum is σ = 4059854064. Its totient is φ = 386652736.

The previous prime is 1449947813. The next prime is 1449947839. The reversal of 1449947820 is 287499441.

It is a self number, because there is not a number n which added to its sum of digits gives 1449947820.

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, 12082839 + ... + 12082958.

It is an arithmetic number, because the mean of its divisors is an integer number (169160586).

Almost surely, 2^1449947820 is an apocalyptic number.

1449947820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1449947820 is an abundant number, since it is smaller than the sum of its proper divisors (2609906244).

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

1449947820 is a wasteful number, since it uses less digits than its factorization.

1449947820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24165809 (or 24165807 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 1449947820 is about 38078.1803661887. The cubic root of 1449947820 is about 1131.8376187896.

The spelling of 1449947820 in words is "one billion, four hundred forty-nine million, nine hundred forty-seven thousand, eight hundred twenty".