1026634644 has 72 divisors (see below), whose sum is σ = 2968853888. Its totient is φ = 293025600.

The previous prime is 1026634627. The next prime is 1026634691. The reversal of 1026634644 is 4464366201.

1026634644 is a `hidden beast` number, since 1 + 0 + 2 + 6 + 6 + 3 + 4 + 644 = 666.

1026634644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1026634644² = 2107957384522013472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1026634599 and 1026634608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 401169 + ... + 403719.

Almost surely, 2^1026634644 is an apocalyptic number.

1026634644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1026634644 is an abundant number, since it is smaller than the sum of its proper divisors (1942219244).

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

1026634644 is a wasteful number, since it uses less digits than its factorization.

1026634644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4165 (or 4160 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 1026634644 is about 32041.1398673643. The cubic root of 1026634644 is about 1008.8005379986.

The spelling of 1026634644 in words is "one billion, twenty-six million, six hundred thirty-four thousand, six hundred forty-four".