1061270640 has 80 divisors (see below), whose sum is σ = 3655495200. Its totient is φ = 283004928.

The previous prime is 1061270591. The next prime is 1061270641. The reversal of 1061270640 is 460721601.

1061270640 is a `hidden beast` number, since 1 + 0 + 6 + 12 + 7 + 0 + 640 = 666.

1061270640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1061270640² = 2252590742652019200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061270641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243505 + ... + 247824.

It is an arithmetic number, because the mean of its divisors is an integer number (45693690).

Almost surely, 2^1061270640 is an apocalyptic number.

1061270640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1061270640 is an abundant number, since it is smaller than the sum of its proper divisors (2594224560).

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

1061270640 is a wasteful number, since it uses less digits than its factorization.

1061270640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491351 (or 491339 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 1061270640 is about 32577.1490465326. The cubic root of 1061270640 is about 1020.0200688093.

The spelling of 1061270640 in words is "one billion, sixty-one million, two hundred seventy thousand, six hundred forty".