1245884838 has 64 divisors (see below), whose sum is σ = 2902597632. Its totient is φ = 352709280.

The previous prime is 1245884837. The next prime is 1245884867. The reversal of 1245884838 is 8384885421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245884837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55731 + ... + 74817.

It is an arithmetic number, because the mean of its divisors is an integer number (45353088).

Almost surely, 2^1245884838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1245884838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1451298816).

1245884838 is an abundant number, since it is smaller than the sum of its proper divisors (1656712794).

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

1245884838 is a wasteful number, since it uses less digits than its factorization.

1245884838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19169.

The product of its digits is 1966080, while the sum is 51.

The square root of 1245884838 is about 35297.0939030397. The cubic root of 1245884838 is about 1076.0339323793.

The spelling of 1245884838 in words is "one billion, two hundred forty-five million, eight hundred eighty-four thousand, eight hundred thirty-eight".