1234457889 has 32 divisors (see below), whose sum is σ = 1971830784. Its totient is φ = 672174720.

The previous prime is 1234457837. The next prime is 1234457929. The reversal of 1234457889 is 9887544321.

It is a happy number.

It is not a de Polignac number, because 1234457889 - 2¹⁵ = 1234425121 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1234457089) 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, 20352 + ... + 53694.

It is an arithmetic number, because the mean of its divisors is an integer number (61619712).

Almost surely, 2^1234457889 is an apocalyptic number.

It is an amenable number.

1234457889 is a deficient number, since it is larger than the sum of its proper divisors (737372895).

1234457889 is a wasteful number, since it uses less digits than its factorization.

1234457889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33437.

The product of its digits is 1935360, while the sum is 51.

The square root of 1234457889 is about 35134.8529098956. The cubic root of 1234457889 is about 1072.7341172552.

The spelling of 1234457889 in words is "one billion, two hundred thirty-four million, four hundred fifty-seven thousand, eight hundred eighty-nine".