1489777478 has 48 divisors (see below), whose sum is σ = 2709033984. Its totient is φ = 611971920.

The previous prime is 1489777463. The next prime is 1489777483. The reversal of 1489777478 is 8747779841.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1489777478.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 322775 + ... + 327357.

It is an arithmetic number, because the mean of its divisors is an integer number (56438208).

Almost surely, 2^1489777478 is an apocalyptic number.

1489777478 is a deficient number, since it is larger than the sum of its proper divisors (1219256506).

1489777478 is a wasteful number, since it uses less digits than its factorization.

1489777478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4737 (or 4730 counting only the distinct ones).

The product of its digits is 22127616, while the sum is 62.

The square root of 1489777478 is about 38597.6356529775. The cubic root of 1489777478 is about 1142.1078980132.

The spelling of 1489777478 in words is "one billion, four hundred eighty-nine million, seven hundred seventy-seven thousand, four hundred seventy-eight".