826423640 has 32 divisors (see below), whose sum is σ = 2125090080. Its totient is φ = 283345152.

The previous prime is 826423597. The next prime is 826423657. The reversal of 826423640 is 46324628.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 826423640.

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, 1475477 + ... + 1476036.

It is an arithmetic number, because the mean of its divisors is an integer number (66409065).

Almost surely, 2^826423640 is an apocalyptic number.

It is an amenable number.

826423640 is an abundant number, since it is smaller than the sum of its proper divisors (1298666440).

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

826423640 is a wasteful number, since it uses less digits than its factorization.

826423640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951531 (or 2951527 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 35.

The square root of 826423640 is about 28747.5849420434. The cubic root of 826423640 is about 938.4278988417.

The spelling of 826423640 in words is "eight hundred twenty-six million, four hundred twenty-three thousand, six hundred forty".