1478990689 has 32 divisors (see below), whose sum is σ = 1748459520. Its totient is φ = 1237473600.

The previous prime is 1478990657. The next prime is 1478990717. The reversal of 1478990689 is 9860998741.

It is not a de Polignac number, because 1478990689 - 2⁵ = 1478990657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1478993689) 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, 724332 + ... + 726370.

It is an arithmetic number, because the mean of its divisors is an integer number (54639360).

Almost surely, 2^1478990689 is an apocalyptic number.

It is an amenable number.

1478990689 is a deficient number, since it is larger than the sum of its proper divisors (269468831).

1478990689 is a wasteful number, since it uses less digits than its factorization.

1478990689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181.

The product of its (nonzero) digits is 7838208, while the sum is 61.

The square root of 1478990689 is about 38457.6479910043. The cubic root of 1478990689 is about 1139.3447267856.

The spelling of 1478990689 in words is "one billion, four hundred seventy-eight million, nine hundred ninety thousand, six hundred eighty-nine".