1026005890 has 64 divisors (see below), whose sum is σ = 2392669440. Its totient is φ = 307618560.

The previous prime is 1026005887. The next prime is 1026005899. The reversal of 1026005890 is 985006201.

It is not an unprimeable number, because it can be changed into a prime (1026005899) 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, 12381 + ... + 46960.

It is an arithmetic number, because the mean of its divisors is an integer number (37385460).

Almost surely, 2^1026005890 is an apocalyptic number.

1026005890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1026005890 is an abundant number, since it is smaller than the sum of its proper divisors (1366663550).

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

1026005890 is a wasteful number, since it uses less digits than its factorization.

1026005890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59387.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1026005890 is about 32031.3266974692. The cubic root of 1026005890 is about 1008.5945520589.

The spelling of 1026005890 in words is "one billion, twenty-six million, five thousand, eight hundred ninety".