1426349820 has 144 divisors (see below), whose sum is σ = 4759540128. Its totient is φ = 318044160.

The previous prime is 1426349797. The next prime is 1426349851. The reversal of 1426349820 is 289436241.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 114624 + ... + 126456.

It is an arithmetic number, because the mean of its divisors is an integer number (33052362).

Almost surely, 2^1426349820 is an apocalyptic number.

1426349820 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 1426349820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2379770064).

1426349820 is an abundant number, since it is smaller than the sum of its proper divisors (3333190308).

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

1426349820 is a wasteful number, since it uses less digits than its factorization.

1426349820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11900 (or 11891 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 1426349820 is about 37767.0467471313. The cubic root of 1426349820 is about 1125.6637584240.

The spelling of 1426349820 in words is "one billion, four hundred twenty-six million, three hundred forty-nine thousand, eight hundred twenty".