1155535040 has 56 divisors (see below), whose sum is σ = 3001774032. Its totient is φ = 420193280.

The previous prime is 1155535039. The next prime is 1155535079. The reversal of 1155535040 is 405355511.

It is a super-2 number, since 2×1155535040² = 2670522457335603200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1155534994 and 1155535012.

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, 160619 + ... + 167658.

Almost surely, 2^1155535040 is an apocalyptic number.

1155535040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155535040 is an abundant number, since it is smaller than the sum of its proper divisors (1846238992).

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

1155535040 is a wasteful number, since it uses less digits than its factorization.

1155535040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328305 (or 328295 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 1155535040 is about 33993.1616652526. The cubic root of 1155535040 is about 1049.3677342430.

The spelling of 1155535040 in words is "one billion, one hundred fifty-five million, five hundred thirty-five thousand, forty".