1258400008 has 16 divisors (see below), whose sum is σ = 2369376000. Its totient is φ = 626566416.

The previous prime is 1258399999. The next prime is 1258400009. The reversal of 1258400008 is 8000048521.

It is not an unprimeable number, because it can be changed into a prime (1258400009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327168 + ... + 330991.

It is an arithmetic number, because the mean of its divisors is an integer number (148086000).

Almost surely, 2^1258400008 is an apocalyptic number.

It is an amenable number.

1258400008 is a deficient number, since it is larger than the sum of its proper divisors (1110975992).

1258400008 is a wasteful number, since it uses less digits than its factorization.

1258400008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658404 (or 658400 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 1258400008 is about 35473.9342052725. The cubic root of 1258400008 is about 1079.6249291997.

Adding to 1258400008 its reverse (8000048521), we get a palindrome (9258448529).

The spelling of 1258400008 in words is "one billion, two hundred fifty-eight million, four hundred thousand, eight".