426750640 has 80 divisors (see below), whose sum is σ = 1049932800. Its totient is φ = 160862976.

The previous prime is 426750629. The next prime is 426750679. The reversal of 426750640 is 46057624.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×426750640² = 364232217480819200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 426750596 and 426750605.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 338331 + ... + 339589.

It is an arithmetic number, because the mean of its divisors is an integer number (13124160).

Almost surely, 2^426750640 is an apocalyptic number.

426750640 is a gapful number since it is divisible by the number (40) 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 426750640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (524966400).

426750640 is an abundant number, since it is smaller than the sum of its proper divisors (623182160).

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

426750640 is a wasteful number, since it uses less digits than its factorization.

426750640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514 (or 1508 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 426750640 is about 20657.9437505285. The cubic root of 426750640 is about 752.8782085727.

The spelling of 426750640 in words is "four hundred twenty-six million, seven hundred fifty thousand, six hundred forty".