1163426640 has 80 divisors (see below), whose sum is σ = 3731011200. Its totient is φ = 299547136.

The previous prime is 1163426609. The next prime is 1163426689. The reversal of 1163426640 is 466243611.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76620 + ... + 90539.

It is an arithmetic number, because the mean of its divisors is an integer number (46637640).

Almost surely, 2^1163426640 is an apocalyptic number.

1163426640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1163426640 is an abundant number, since it is smaller than the sum of its proper divisors (2567584560).

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

1163426640 is a wasteful number, since it uses less digits than its factorization.

1163426640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167204 (or 167198 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 1163426640 is about 34109.0404438471. The cubic root of 1163426640 is about 1051.7511639963.

The spelling of 1163426640 in words is "one billion, one hundred sixty-three million, four hundred twenty-six thousand, six hundred forty".