826861990 has 16 divisors (see below), whose sum is σ = 1513578960. Its totient is φ = 325138720.

The previous prime is 826861967. The next prime is 826862017. The reversal of 826861990 is 99168628.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 700141 + ... + 701320.

It is an arithmetic number, because the mean of its divisors is an integer number (94598685).

Almost surely, 2^826861990 is an apocalyptic number.

826861990 is a deficient number, since it is larger than the sum of its proper divisors (686716970).

826861990 is a wasteful number, since it uses less digits than its factorization.

826861990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401527.

The product of its (nonzero) digits is 373248, while the sum is 49.

The square root of 826861990 is about 28755.2080500211. The cubic root of 826861990 is about 938.5937892076.

The spelling of 826861990 in words is "eight hundred twenty-six million, eight hundred sixty-one thousand, nine hundred ninety".