2311029840 has 160 divisors (see below), whose sum is σ = 8378320896. Its totient is φ = 515934720.

The previous prime is 2311029829. The next prime is 2311029887. The reversal of 2311029840 is 489201132.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2311029798 and 2311029807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56245 + ... + 88235.

Almost surely, 2^2311029840 is an apocalyptic number.

2311029840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2311029840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4189160448).

2311029840 is an abundant number, since it is smaller than the sum of its proper divisors (6067291056).

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

2311029840 is a wasteful number, since it uses less digits than its factorization.

2311029840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32057 (or 32051 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 2311029840 is about 48073.1717281063. The cubic root of 2311029840 is about 1322.1128238885.

The spelling of 2311029840 in words is "two billion, three hundred eleven million, twenty-nine thousand, eight hundred forty".