1091426256 has 30 divisors (see below), whose sum is σ = 3054478050. Its totient is φ = 363808704.

The previous prime is 1091426251. The next prime is 1091426257. The reversal of 1091426256 is 6526241901.

1091426256 is a `hidden beast` number, since 10 + 9 + 14 + 2 + 625 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 561690000 + 529736256 = 23700^2 + 23016^2 .

It is a super-4 number, since 4×1091426256⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1091426256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091426251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3789531 + ... + 3789818.

It is an arithmetic number, because the mean of its divisors is an integer number (101815935).

Almost surely, 2^1091426256 is an apocalyptic number.

1091426256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1091426256 is an abundant number, since it is smaller than the sum of its proper divisors (1963051794).

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

1091426256 is a wasteful number, since it uses less digits than its factorization.

1091426256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7579363 (or 7579354 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1091426256 is about 33036.7410014971. The cubic root of 1091426256 is about 1029.5911457374.

The spelling of 1091426256 in words is "one billion, ninety-one million, four hundred twenty-six thousand, two hundred fifty-six".