1246423640 has 128 divisors (see below), whose sum is σ = 3536524800. Its totient is φ = 384046080.

The previous prime is 1246423639. The next prime is 1246423643. The reversal of 1246423640 is 463246421.

It is a junction number, because it is equal to n+sod(n) for n = 1246423597 and 1246423606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1246423643) 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, 271847 + ... + 276393.

It is an arithmetic number, because the mean of its divisors is an integer number (27629100).

Almost surely, 2^1246423640 is an apocalyptic number.

1246423640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1246423640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1768262400).

1246423640 is an abundant number, since it is smaller than the sum of its proper divisors (2290101160).

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

1246423640 is a wasteful number, since it uses less digits than its factorization.

1246423640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4665 (or 4661 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 1246423640 is about 35304.7254627479. The cubic root of 1246423640 is about 1076.1890258145.

The spelling of 1246423640 in words is "one billion, two hundred forty-six million, four hundred twenty-three thousand, six hundred forty".