1061423640 has 48 divisors (see below), whose sum is σ = 3449628000. Its totient is φ = 283046208.

The previous prime is 1061423593. The next prime is 1061423641. The reversal of 1061423640 is 463241601.

1061423640 is a `hidden beast` number, since 1 + 0 + 6 + 14 + 2 + 3 + 640 = 666.

It is a super-2 number, since 2×1061423640² = 2253240287101699200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061423641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1473840 + ... + 1474559.

It is an arithmetic number, because the mean of its divisors is an integer number (71867250).

Almost surely, 2^1061423640 is an apocalyptic number.

1061423640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1061423640 is an abundant number, since it is smaller than the sum of its proper divisors (2388204360).

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

1061423640 is a wasteful number, since it uses less digits than its factorization.

1061423640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2948416 (or 2948409 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1061423640 is about 32579.4972336898. The cubic root of 1061423640 is about 1020.0690841329.

The spelling of 1061423640 in words is "one billion, sixty-one million, four hundred twenty-three thousand, six hundred forty".