1091438862 has 64 divisors (see below), whose sum is σ = 2351462400. Its totient is φ = 336512000.

The previous prime is 1091438861. The next prime is 1091438891. The reversal of 1091438862 is 2688341901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091438861) 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, 2278339 + ... + 2278817.

It is an arithmetic number, because the mean of its divisors is an integer number (36741600).

Almost surely, 2^1091438862 is an apocalyptic number.

1091438862 is an abundant number, since it is smaller than the sum of its proper divisors (1260023538).

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

1091438862 is a wasteful number, since it uses less digits than its factorization.

1091438862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 1091438862 is about 33036.9317885302. The cubic root of 1091438862 is about 1029.5951096564.

The spelling of 1091438862 in words is "one billion, ninety-one million, four hundred thirty-eight thousand, eight hundred sixty-two".