1164533440 has 56 divisors (see below), whose sum is σ = 3169200672. Its totient is φ = 399267840.

The previous prime is 1164533431. The next prime is 1164533479. The reversal of 1164533440 is 443354611.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×1164533440² = 2712276265756467200, which contains 22 as substring.

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, 257701 + ... + 262180.

Almost surely, 2^1164533440 is an apocalyptic number.

1164533440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1164533440 is an abundant number, since it is smaller than the sum of its proper divisors (2004667232).

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

1164533440 is an equidigital number, since it uses as much as digits as its factorization.

1164533440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519905 (or 519895 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 1164533440 is about 34125.2610246427. The cubic root of 1164533440 is about 1052.0845782983.

The spelling of 1164533440 in words is "one billion, one hundred sixty-four million, five hundred thirty-three thousand, four hundred forty".