1026421860 has 48 divisors (see below), whose sum is σ = 2876170752. Its totient is φ = 273504000.

The previous prime is 1026421849. The next prime is 1026421867. The reversal of 1026421860 is 681246201.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1026421867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83085 + ... + 94635.

It is an arithmetic number, because the mean of its divisors is an integer number (59920224).

Almost surely, 2^1026421860 is an apocalyptic number.

1026421860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1026421860 is an abundant number, since it is smaller than the sum of its proper divisors (1849748892).

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

1026421860 is a wasteful number, since it uses less digits than its factorization.

1026421860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13044 (or 13042 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 1026421860 is about 32037.8192141725. The cubic root of 1026421860 is about 1008.7308373033.

The spelling of 1026421860 in words is "one billion, twenty-six million, four hundred twenty-one thousand, eight hundred sixty".