1155020620 has 24 divisors (see below), whose sum is σ = 2612124144. Its totient is φ = 426469056.

The previous prime is 1155020611. The next prime is 1155020627. The reversal of 1155020620 is 260205511.

It is a junction number, because it is equal to n+sod(n) for n = 1155020591 and 1155020600.

It is not an unprimeable number, because it can be changed into a prime (1155020627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2220934 + ... + 2221453.

It is an arithmetic number, because the mean of its divisors is an integer number (108838506).

Almost surely, 2^1155020620 is an apocalyptic number.

1155020620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155020620 is an abundant number, since it is smaller than the sum of its proper divisors (1457103524).

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

1155020620 is a wasteful number, since it uses less digits than its factorization.

1155020620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4442409 (or 4442407 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1155020620 is about 33985.5943011153. The cubic root of 1155020620 is about 1049.2119922834.

The spelling of 1155020620 in words is "one billion, one hundred fifty-five million, twenty thousand, six hundred twenty".