1081241778 has 16 divisors (see below), whose sum is σ = 2276298720. Its totient is φ = 341444736.

The previous prime is 1081241761. The next prime is 1081241809. The reversal of 1081241778 is 8771421801.

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, 4742175 + ... + 4742402.

It is an arithmetic number, because the mean of its divisors is an integer number (142268670).

Almost surely, 2^1081241778 is an apocalyptic number.

1081241778 is an abundant number, since it is smaller than the sum of its proper divisors (1195056942).

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

1081241778 is a wasteful number, since it uses less digits than its factorization.

1081241778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9484601.

The product of its (nonzero) digits is 25088, while the sum is 39.

The square root of 1081241778 is about 32882.2410732602. The cubic root of 1081241778 is about 1026.3786415619.

The spelling of 1081241778 in words is "one billion, eighty-one million, two hundred forty-one thousand, seven hundred seventy-eight".