426615816 has 128 divisors (see below), whose sum is σ = 1297036800. Its totient is φ = 115246080.

The previous prime is 426615743. The next prime is 426615817. The reversal of 426615816 is 618516624.

It is a happy number.

It is a super-2 number, since 2×426615816² = 364002108922691712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (426615817) 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, 82771 + ... + 87773.

It is an arithmetic number, because the mean of its divisors is an integer number (10133100).

Almost surely, 2^426615816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 426615816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (648518400).

426615816 is an abundant number, since it is smaller than the sum of its proper divisors (870420984).

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

426615816 is a wasteful number, since it uses less digits than its factorization.

426615816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5059 (or 5055 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 426615816 is about 20654.6802444385. The cubic root of 426615816 is about 752.7989142232.

The spelling of 426615816 in words is "four hundred twenty-six million, six hundred fifteen thousand, eight hundred sixteen".